You can end it yourself by not participating in it.
Perhaps Delves would be more to your liking or Normal Raid (although PUGs are always going to be intolerant of poor performers regardless of the type of content, if a poor performer could spell failure for the entire group). Solo Delves avoids PUGs altogether and being a poor performer in a PUG situation seem to be the root of the problem you describe.
Taking away choices for people that can do challenging content with friends/guildies (i.e., removing M+ per title) is a terribly bad idea. Take a class in human psychology along with a basic business class and improve your knowledge to understand why it’s so laughably poor of a solution.
The vast majority of player respondents to Blizzard’s own poll on favorite game modes suggests otherwise.