The complaints are all over the place so likely coming from people that either A.) haven't actually used Lemmy. B.) Used it for .5 seconds got confused and gave up. C.) Are just afraid of change and just wanna stick their heads in the sand...

But most of them center around how difficult lemmy is to use and how "communities are way too overbearing with the rules." , that it uses the new.reddit UI, and that it's run by a bunch of "tankies"