Daas, I don’t know where you are getting these statements from – I learned by him for several years and was present during a lot of these “hock” issues as they unfolded in real time. I heard him say that it’s better to avoid filtered water in general, and i heard him explain his heterim in almost the exact wording i posted.
I heard him mock and excoriate rabbonim who assered the fish that contained the anisaskis worms, and there’s a fairly accessible recording of him exchanging insults with one such figure. He had extremely strong words for – up to mocking the names of – rabbis who allowed making an eruv in Brooklyn. There are many, many people who spent years learning by him who are easily accessible. He held a lot of rav dovid feinstein, but I never heard him bring him up as a “yesh omrim” the way you describe