My friend, even Jesus words are twisted by some to justify or to motivate misgivings, what of the texts themselves? are the Hebrew texts invalid or do they lie? Jesus held a great reverence for the recorded scriptures available in his day. He did not speak of his own authority, but regularly referred to the written word.
But He answered and said, “It is written: ‘Man shall not live by bread alone, but by every word that proceeds out of the mouth of God
Now don't get me wrong, I am in complete agreement with you that Jesus teachings are the most central teachings to the life of any Christian,
Beyond that however, what you appear to be saying (please put me straight if I am wrong, I have no wish to misrepresent your position) is that because the word of God has been mishandled by others, that we should abandon it entirely.
Are the Hebrew texts not beneficial for teaching, rebuking, correcting and training in righteousness, that the man of God may be fully equipped to do every good work?
I do notice a strangeness about so-called Christians that get unusually excited rattling off about verses in the Old Testament
Do you realise that in Jesus footsteps, the apostles also got unusually excited about rattling off Hebrew scriptures, if it would help, I can provide a list of hundreds of direct quotes and allusions from what you now dub the Old Testament, even I was surprised at how many there were, but it certainly doesn't read like they had any problems with it