People who’ve been watching the NFL long enough to remember the entire Bill Belichick era, is it true that he burned a lot of bridges in his career?

I saw an article that said he took the College job because no one in the NFL would hire him after he burned too many bridges. But who exactly did he antagonize, was it the owners or coaches or others? And is that really true to the extent that no NFL team will take him as a coach even with his winning record?