First, have you ever thought about hosting your own group? Are there people that you have enjoyed playing against? Make a list and specifically invite those players. If you are currently playing online, send messages to people asking them when is good for them and make your own pod. This should help avoid the unexpected player. When the lockdown is over, consider inviting people to your place and creating your own pod.
Second, this is the internet and I don't know any of you. So, I don't know how to say this any more gently, but if the problem follows you wherever you go, have you ever considered that you are the problem? If I am being entirely honest, some of the language and tone of your posts comes across as indignant, self-righteous, and elitist. I am not intending to insult you, simply trying to provide a possible answer. If this is a completely unfair representation, then I apologize, and I will move on.
Can you reconsider your expectations? If "mass-everything-destruction.dek and no-turn-for-you.dek types" lead to losses, is this the end of the world? Can you still find a way enjoy the game?
Finally, as others have said, at some point you have to be vocal. Tell people you don't want to play against their "no fun" deck. If you are unwilling to have these type of conversations, nothing will change.