Why do people only do this to the x11 guy?

I bet if you interrogated the wayland side to the same degree you would find similar, or worse. Afterall, who is more likely to be the bad guy? The corporations hurting linux by killing accessibility and interoperability, or the guy giving his spare time to save them?

Because he's the person behind the project. https://x11libre.net/#about

Because he is a solo maintainer and has an outweighed influence on the software I would depend on. Plasma community is much healthier as a whole.

Find your criticisms of others and, if valid, air them. But surely, don't expect others to be silent in the face of harmful and terrible voices.