Torah is for sinners....
9 Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,
10 For whoremongers, for them that defile themselves with mankind, for menstealers, for liars, for perjured persons, and if there be any other thing that is contrary to sound doctrine;
You barely understand that Paul wasn't writing to a bunch of modern day so called Christians but was writing to the unbelieving Jews who depended on their works of Torah rather than Messiah as the goal of Torah.
It doesn't mean Torah is totally abrogated as Christendom thinks it to be.
First see the context of scriptures you quoted from:
1Tim 1:7 Desiring to be teachers of the law; understanding neither what they say, nor whereof they affirm.
Who was Paul talking about? Who were teaching the Torah? It's the unbelieving Jews who taught the Torah in self-righteousness without understanding that the Torah leads to death apart from the works of Messiah.
You got to harmonize all scriptures and Paul tells in Romans that the Torah is not abolished:
Rom 7:12 So that the Torah truly is set-apart, and the command set-apart, and righteous, and good.
14 For we know that the
Torah is Spiritual, but I am fleshly, sold under sin.
The problem was not with The Torah but the real problem is the sin within working death against the Torah of God.
That's the reason John calls all those Jews denying that Jesus/Yahusha Christ/Messiah has come in flesh as anti-Christs.
Israel after flesh weren't able to obey because Torah is spiritual and it required Spiritual Seed of God -Jesus Christ to come in flesh to fulfill obedience for Israel as an whole as well as individually.
This is the essence of the gospel missing in Christendom which will lead individuals to destruction.
The works of the Torah by fleshly men doesn't work out righteousness. The righteous are the only ones who have Christ (personifying Torah) in them.
Coming back to Paul, he teaches that the Torah is rather established firmly in Christ as the fruit of obedience:
Rom 3:31 Do we then make void the law through faith? God forbid: yea, we establish the law.
All of Paul's epistles are addressed to his fellow Jews as well as the lost sheep of the house of Israel. He is not writing to a bunch of so called modern day lawless Christians who have no understanding of Torah.
The definition of sin is breaking the Torah which has not changed even today:
1John 3:4
Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.
5 And ye know that he was manifested to take away our sins; and in him is no sin.
6 Whosoever abideth in him sinneth not: whosoever sinneth hath not seen him, neither known him.
Whoever abiding in Jesus Christ will not sin - in other words, he will not break the Torah but rather have it as a fruit of righteousness.