What made reddit so popular in my opinion was that every sub wasn't filled with agenda driven narratives you could find interests or memes random people with deep insights to whatever the topic was.
In Lemmy it seems every sub is skewed with left wing or DTS filled insane ppl and to find just normal shit is the rarity
Much like when there is an exodus on other platforms to host only right leaning viewpoints a "normal" person viewing it will see the same thing Lemmy has become and just go back to what they were using before
The problem is not the platform its the people. Chill tf out with all that propaganda horseshit and u might get regular ppl to use your product.