You type so much yet say so little. Trim your posts down and say what you mean rather than pontificating like you tend to do. Maybe then people won't have to sift through what you type to find what you're trying to say.
Anyway,
since most people do speedruns, wouldn't that put people who share your sentiment in the minority?
Maybe you should form premade groups in the party finder. There's even an option to tick for "Taking it slow".
This seems to be a simple and elegant solution.