AFAIK there is no way to play he multiplayer locally, Doom Eternal has an online fix via MS Store tha you can download from online-fix.me. As for the multiplayer features, 2016 is more like the multiplayer mode in the OG Doom, Eternal is a 2v1 2 Demons versus 1 Slayer. They are very different so you cant really compare them.

Report it on ublock origins github, gets fixed pretty quickly from my experience

If used them a few times before tools to rip from streaming services became as common as they are now and thkse releases are fine. Dont really see a reason to use them nowadays tho besdies the scenes seal of approval.

Also I get your frustration with people not understanding what you mean with “scene” here, but tbf you could have specified which scene, in this case it would be the warezscene that you are talking about.

For those unaware about the warezscene, they are the groups that make releases for every type of media and are bound by rules (you can look them up if you wanna know specifics about those), the names the op mentioned are a result of those rules.