The OP is complaining about all the Reddit bitching on his front page. There is some control over the looks of one’s front page in profile settings. If set to “All”, then yeah there’s going to be a lot of stuff outside of interest on the front page. My front page is set to “Subscribed” so I have to intentionally look for that stuff if I want to see it.
The way to use Lemmy is to subscribe to communities with content of interest and use the the subscribed view. Maybe this is more a case of someone new to Lemmy not understanding the best way to use Lemmy.