Per the reference you had made in regards to Matthew 22:36-40, that was a Jew asking Jesus about the greatest commandment in the law. That Jew was not asking Jesus Christ about how to be saved. There is no direct connection between that question and your application.
However, if you had referred to this scriptural reference when Jesus did say the laws of the Old Covenant was about obtaining salvation, you may think you have a case but you should consider the end result about salvation to be obtained under the law.
Matthew 19:16 And, behold, one came and said unto him,
Good Master, what good thing shall I do, that I may have eternal life? 17 And he said unto him, Why callest thou me good? there is none good but one, that is, God: but if thou wilt enter into life, keep the commandments. 18 He saith unto him, Which? Jesus said, Thou shalt do no murder, Thou shalt not commit adultery, Thou shalt not steal, Thou shalt not bear false witness, 19 Honour thy father and thy mother: and, Thou shalt love thy neighbour as thyself.
20 The young man saith unto him, All these things have I kept from my youth up: what lack I yet?
21 Jesus said unto him, If thou wilt be perfect, go and sell that thou hast, and give to the poor, and thou shalt have treasure in heaven: and come and follow me. 22 But when the young man heard that saying, he went away sorrowful: for he had great possessions.
23 Then said Jesus unto his disciples, Verily I say unto you, That a rich man shall hardly enter into the kingdom of heaven. 24 And again I say unto you, It is easier for a camel to go through the eye of a needle, than for a rich man to enter into the kingdom of God. 2
5 When his disciples heard it, they were exceedingly amazed, saying, Who then can be saved?
26 But Jesus beheld them, and said unto them, With men this is impossible; but with God all things are possible.
Now what was the end result of that rich man in keeping the law?
What is the significance of His disciples asking who can be saved, if not by the keeping of the law which that rich man did?
Did Jesus say that it is impossible for men to be saved by the law and so only God can save them instead?
Anyway, this scripture is more in line with your personal belief,
BUT Jesus defers from anyone trying to save themselves by the laws of the Old Covenant to what the New Covenant is about, believing Jesus Christ as God the Saviour will save them and He put His laws in our hearts to follow Him when we trust Him to do His work in us.
John 14:15-16 is about salvation as those commandments He repeats over and over again from verse 1 is for that end in how anyone gets the Holy Spirit. This is not about all the other commandments regarding discipleship for abiding in Him and following Him which we are to not look to ourselves to do by doing the best we can, but by faith in Jesus Christ as our Good Shepherd to help us to follow Him for we can do nothing without Him. See verse 5 in
John 15:1-11 KJV and see verse 8 that this is about abiding in Him as His disciples in bearing fruit; not for obtaining salvation. See verse 6 for the consequence for saved believers not to abide in Him & His words as His disciples is to be left behind for when He sends that fire on the earth after the pre great tribulation rapture event.
Luke 12:40-49 KJV
All your other references in the Book of 1 John was about discipleship for believers to know who is abiding in Him from those that are not. 1 John 1:3-10 sets the basis for why John was writing this epistle.
And then look at the two new greatest commandments in 1 John 3:23 under the new Covenant now.
1 John 3:22 And whatsoever we ask, we receive of him, because we keep his commandments, and do those things that are pleasing in his sight.
23 And this is his commandment, That we should believe on the name of his Son Jesus Christ, and love one another, as he gave us commandment. 24 And he that keepeth his commandments dwelleth in him, and he in him. And hereby we know that he abideth in us, by the Spirit which he hath given us.
The question you need to ask yourself is.. what is the New Covenant about for why the Old Covenant and the laws under them are vain?
I'd say the Old Covenant was man's turn to do the best he can in making himself good and to obtain salvation, but failing that, it is now God's turn under the New Covenant and all he asks from you is to believe in Jesus Christ that He has saved you & He will help you to follow Him as He will finish His work in you to His glory.
Your hope should not be in the law but in Jesus Christ now.
1 John 3:3
And every man that hath this hope in him purifieth himself, even as he is pure.... 8 He that committeth sin is of the devil; for the devil sinneth from the beginning.
For this purpose the Son of God was manifested, that he might destroy the works of the devil.
Philippians 1:6 Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ:... 11 Being filled with the fruits of righteousness, which are by Jesus Christ, unto the glory and praise of God.
2 Timothy 4:18 And the Lord shall deliver me from every evil work, and will preserve me unto his heavenly kingdom: to whom be glory for ever and ever. Amen.
So ask yourself what do you hope in Jesus Christ for?
If you cannot answer that, then you may see the difference between putting hope in yourself in keeping the law or even His commandments when they are higher than the works of the law for why your hope should be on Jesus Christ for all things.
Romans 8:31 What shall we then say to these things? If God be for us, who can be against us? 32 He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things? 33 Who shall lay any thing to the charge of God's elect? It is God that justifieth.
Romans 3:24 Being justified freely by his grace through the redemption that is in Christ Jesus: 25 Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God; 26 To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus. 27 Where is boasting then? It is excluded. By what law? of works? Nay: but by the law of faith. 28 Therefore we conclude that a man is justified by faith without the deeds of the law.