90% of the badwebcomics wiki exists for no reason but to shit on someone for daring to put themselves out in public where others can see them. I completely agree. There’s the odd creator on there that fully deserves criticism for genuine assholery and abuse, but mostly it’s like “this guy makes a very cringy comic, jump him!” bullshit.
A new engine would just have to have a new mod API. Plenty of engines have mod APIs. Nothing’s really stopping them, but they really love driving creation engine onward for some reason.