I appreciate Metallica but I don't know whats so special about them, that style of thrash metal was already being done on a much more advanced level by bands like Razor at that time, so if you had any personal disagreements with Metallica it seems historically it would have been quite easy to drop them.
I enjoy them ironically by playing the MP3’s have of their songs that I definitely only ever got from ripping physical media that I definitely did not pirate because fuck Metallica lol.
As I said I don't mind them, personally they are not in my list of favorite thrash bands, but they are also not in my list of sucky bands, they are competent and accomplished musicians. I just felt anyone shouldn't have felt much emotionality ditching Metallica for whatever reasons as at that time other bands were already playing far more advanced thrash metal.