Instagram's algorithm is based on what you interact the most with (even stopping to watch the reel, to read comments or to write one counts as interacting). You can start marking all that content as "Not interesting" and in the worst case just blocking those profiles to fix your feed and algorithm (or even go to your settings and tweak your interests directly).
But uninstalling the app is never a bad choice regardless
But uninstalling the app is never a bad choice regardless