Does federation have a bit of a learning curve? No doubt.
Is Lemmy buggy as heck? Absolutely.
But I don’t think that really justifies a lot of the comments I’m seeing in Reddit alternatives threads that it’s hard to figure out. The front page feed and sort options are very similar to Reddit. Searching for same-instance communities is not too difficult. Posting, commenting, and voting are all quite intuitive. What’s the problem?
For those that enjoy using Reddit, they are perfectly happy to remain… so why try to force the issue?
Their criticisms of this place are most often correct - it does have less functionality, it does have a barrier to entry, starting right from the beginning in picking an instance to join, and if you later switch then you have to make a new account and start over (I think? although your old content would still be accessible, it wouldn’t be “yours” anymore without logging into the old one). We prefer it anyway, but it’s up to them what they want to do.