I've just seen a lot of post recently complaining what they see on their front pages such as news, politics, endless memes, etc. But you do know if any of those subs bother you or seem excessive, you can filter the subs so that they don't appear on your front page anymore. Filter memes and 196, and about 70 percent of the memes disappear. Filter world news and news, and bam, most of the news is gone. Don't like politics? Me neither. Just filter politics and any other political subs and bam problem solved.

And let's say you don't want to spend an afternoon filtering subs you don't want to see, and just want to see more games, hobbies, sports, etc. First sub to the communities you want to follow, then go to your settings. You can make it to where lemmy/kbin shows you your subs by default rather than what's popular. Now you have an experience that is totally yours.

And let's say you are not seeing the content you want to see regularly. The best way to ecourage diversity is to post yourself. Post frequently in the communities you want to grow. That's what the people in the subs that annoy you did to start with. Almost all popular communities have at least one power user who regularly and frequently posts. Hell if you don't want to block a community but want to see less from them, it's not hard to find these power users and filter their content.

TLDR: Lemmy/kbin are extremely customizable. You can create the experience you want to have.