2 Timothy IS scripture. It is in the Bible, God's Word. Do you honestly think that God, Yahweh, would have allowed people to be misled by doctrine that He didn't want to be in the Bible? Absolutely not, for God is not the author of confusion for those seeking Him.
1 Corinthians 14:33
33 For God is not the author of confusion, but of peace, as in all churches of the saints.
Consider also:
Numbers 23:19
19 God is not a man, that he should lie.......
Now, we see that God does not lie. We also see that he doesn't bring confusion, but peace. According to you, 2 Timothy is an opinion of Paul, nothing more. You claim it is not scripture, or at the least wasn't scripture. According to that logic, you could say that the gospels were opinions, since they are in the New Testament as well. Hence, without the gospel, we wouldn't be here discussing this topic. You have to be consistent. You can't say that 2 Timothy verses are not scripture because, perhaps, it was just being written, but then claim that it is different for the gospels, as it seems you believe those. After all, they were both post-Old Testament and were written close to the same time period.
When it says inspired by God, it means that: God Breathed. God, through the Holy Spirit, led men to write the books. It is God's words, through man, not man's words.
Do you think that God would inspire men to write books that were not true, which would confuse mankind? No. He is not the author of confusion for those who seek Him.
I noticed that it says "Christian seeker" under your name. I say this in love, but scripture states that
Faith comes by hearing (discerning) and hearing by the Word of God (the Bible).
Romans 10:17
17 So then faith cometh by hearing, and hearing by the word of God.
You have admitted that you don't believe certain aspects of the Word of God. You are not allowing God an opening into your life through His Word, as you have put up barriers.
What does the Bible say about the unsaved as it comes to understanding the Word?
1 Corinthians 2:14
14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
God's Word says that to the lost, the natural man, the things of God are foolishness. The only way for this not to be so is to allow the scripture through God to speak to you.
Hebrews 4:12
12 For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
Look at all of Hebrews 4: 1-13
1 Let us therefore fear, lest, a promise being left us of entering into his rest, any of you should seem to come short of it.
2 For unto us was the gospel preached, as well as unto them: but the word preached did not profit them, not being mixed with faith in them that heard it.
3 For we which have believed do enter into rest, as he said, As I have sworn in my wrath, if they shall enter into my rest: although the works were finished from the foundation of the world.
4 For he spake in a certain place of the seventh day on this wise, And God did rest the seventh day from all his works.
5 And in this place again, If they shall enter into my rest.
6 Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:
7 Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.
8 For if Jesus had given them rest, then would he not afterward have spoken of another day.
9 There remaineth therefore a rest to the people of God.
10 For he that is entered into his rest, he also hath ceased from his own works, as God did from his.
11 Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.
12 For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
The Word of God pierces the soul and spirit. However, those who do not have faith it does not profit them. Why? unbelief.
Coupled with the other verse about the things of God being foolishness to the unsaved who are in unbelief, do you think that perhaps this is your struggle?
God has given us freewill to accept His gift of eternal life. However, you must allow God to do a work in you and believe on Jesus Christ.