I agree, trying to get used to Lemmy and the amount of shit posts and low quality content can be fatiguing. Compound that with servers limiting people who can create accounts (lemmy.ml for instance) and inconsistent features for filtering/blocking memes and shit post communities on servers you don’t have an account on— it’s hard to get used to the disorganized mess.
Reddit thrived on consistent leadership within it’s communities, if you didn’t like one you could create another with clear access/visibility to the rest of the user base. If Reddit is an echo chamber, Lemmy seems to be doubly so.