You think the fediverse is oversaturated? That pretty crazy. Maybe you should curate your feed a little better, since, you know, it gives you the tools to do that.
If you've read about the network effect, you'll understand that the more we have people posting here, the more people will view it as an alternative to corporate platforms, and the more the userbase will grow, in turn creating a larger network effect.
There are still dozens of niche communities that are either non-existent on the fediverse or completely inactive. Until we have active comms to replace all those subreddits that people say make it hard to leave reddit, the fediverse is by no means oversaturated.
The user you're railing against isn't posting anything obtrusive. Their comments are generally thoughtful. I don't know why you feel the need to manufacture outrage against them.