You are correct in that it isn't a hot take.
You are incorrect in the usage of the word accusation as well as the following statement of based on nothing.
He deduced, based off the rest of his career aside for one tournament, that he is overrated.
It isn't a hot take because it is true and widely believed.
Prior to NCAAs he was 10W-6L (62.5% WP) and seeded 11th (not to place). He beat four guys who had better seasons than him to place 5th. He then took a year off - much of it not training because he thought his competitive career was done. It is a fair deduction for him to say he is overrated. It isn't a hot take, though.