Jesus only kept and taught Torah. He did not teach anything different than Moses.So are you saying that Moses sent Christ? Doesn't fix anything. No one said abandon the good doctrine, but that it is within the Son of God who we are to follow.
You still haven't answered my question. Who interprets the Law for you?
“The Lord your God will raise up for you a prophet like me from among you, from your countrymen, you shall listen to him. This is according to all that you asked of the Lord your God in Horeb on the day of the assembly, saying, ‘Let me not hear again the voice of the Lord my God, let me not see this great fire anymore, or I will die.’ The Lord said to me, ‘They have spoken well. I will raise up a prophet from among their countrymen like you, and I will put My words in his mouth, and he shall speak to them all that I command him. It shall come about that whoever will not listen to My words which he shall speak in My name, I Myself will require it of him.
Deuteronomy 18:15-19 NASB
https://bible.com/bible/100/deu.18.15-19.NASB
There was nothing wrong with the Torah. It was and is perfect.