Go to your Profile in the upper corner (your picture and the little person icon at the bottom), Preferences (the gear icon), over to the Users tab, and there you can type in whoever you want to mute/ignore and for how long.
Compared to some of the other suggestions you’ve made, like creating an entirely separate forum, the amount of resources required would be a drop in the bucket.
well if people truly aren’t happy with this forum and the way in which it was designed, perhaps those people can simply go make their own forums and run it as they please?