Feeds are littered with repost bots recycling mindlessly internet trash. Not rare is to see series of exactly same posts from different communities with no comments.
Say what you want, Reddit got this one better
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Lemmy has a setting to hide bots globally if you’d like. Most of the reposts are done by just a few bots and yes I agree they serve no purpose but to spam content nobody cares about, thankfully it’s easy to fix.
What is this magic you speak of… where do I find said setting?
click your name in the upper right corner, settings, unmark show bot accounts.
But i would recommend to just block the bots on your frontpage that happen to annoy you.