Wow! You packed in a lot there. I will gladly submit to God. Please show me where in the Bible God expressly says, "Thou shalt not pray in the Spirit to Me in private! How dare you! And while we're at it, don't pray 'normally' in private or worship Me in private either because that only edifies yourself not the Body! How dare you want to be close to Me!"
Let me ask you this; scripture does not go against scripture for why you need His help to discern the truth in His words.
All Bibles in John 16:13 testify that the Holy Spirit CANNOT utter His own intercessions from Himself.
John 16:13 Howbeit when he, the Spirit of truth, is come, he will guide you into all truth:
for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
KJV
John 16:13 But when He, (
A)the Spirit of truth, comes, He will (
B)guide you into all the truth;
for He will not speak on His own, but whatever He hears, He will speak; and He will disclose to you what is to come.
NASB
John 16:13 Howbeit when he, the Spirit of truth, is come, he shall guide you into all the truth:
for he shall not speak from himself; but what things soever he shall hear, these shall he speak: and he shall declare unto you the things that are to come.
ASV
John 16:13 But when the Spirit of truth [C the Helper; see
16:7] comes, he will ·lead [guide] you into all truth.
He will not speak ·his own words [from his own authority; L from himself], but he will speak only what he hears [C from the Father], and he will ·tell [announce/declare to] you what is to come.
Expanded Bible
John 16:13 When the Holy Spirit, who is truth, comes, he shall guide you into all truth,
for he will not be presenting his own ideas, but will be passing on to you what he has heard. He will tell you about the future.
Living Bible
That is why God's gift of tongues is used by the Holy Spirit to speak unto the people as He cannot use God's gift of tongues to turn it around and speak gibberish nonsense back to God for His own purposes like praying out loud in any shape or form in uttering His intercessions from Himself.
Then there is this;
Matthew 6:7 But when ye pray, use not vain repetitions, as the heathen do: for they think that they shall be heard for their much speaking. 8 Be not ye therefore like unto them: for your Father knoweth what things ye have need of, before ye ask him.
If you are not to pray like that and yet the Father knows before you even ask, why does the Holy Spirit has to pray like that when the Son knows the mind of the Spirit as the Son is the One searches our hearts per Hebrews 4:12-16, then the Holy Spirit does not need to say anything out loud because Jesus is the Only mediator between God and men to give all intercessions to the Father through Himself because when the Father agrees with any of those intercessions presented by the Son, be it ours, the Holy Spirit's, or His own, the Son answers the prayers so that the Father may be glorified in the Son for answers to prayers.
John 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.... 13 And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son. 14 If ye shall ask any thing in my name, I will do it.
Since you have been deceived by the spirits of the antichrist, it is no wonder why you cannot see the lies in that false science, the evolution theory. You still have the spirit of truth in you, but apparently, God permit that strong delusion to occur because you believed the lie that the baptism with the Holy Ghost with evidence of tongues is how one knows they have the Holy Spirit.
The fact that you believe in the Lord Jesu Christ & that God has raised Him from the dead is how you can know you are saved.
Tongues for private use does not profit you at all because you cannot tell if you are being self edified or the Holy Spirit is praying for you per your belief and that is only 2 examples of the so called benefits for tongues for private use; and that, brother, is the epitome of confusion.
Better to know what you had prayed for normally to know when you get an answer to prayers to give genuine thanks to the Father in Jesus's name for answers to prayers. Now who would like to get in the way of that? That's right. The devil.
1 Thessalonians 5:7 Pray without ceasing. 18 In every thing give thanks: for this is the will of God in Christ Jesus concerning you.
2 Timothy 2:15 Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth. 16 But shun profane and vain babblings: for they will increase unto more ungodliness....
24 And the servant of the Lord must not strive; but be gentle unto all men, apt to teach, patient, 25 In meekness instructing those that oppose themselves; if God peradventure will give them repentance to the acknowledging of the truth; 26 And that they may recover themselves out of the snare of the devil, who are taken captive by him at his will.