It's funny, I have the opposite experience with the KN95. I had no trouble with basic cloth masks, but when omicron came around and we started seeing more and more people wearing their masks incorrectly or not at all, we decided to upgrade to the KN95. I find I can't breathe through my nose at all without blasting air into my eyes. Worse, I eventually get completely stuffed up, after only 20-30 minutes.
Now, I've had my nose broken a few times playing sports and had surgery on my nose as well, so maybe that's part of my problem.
It's a sacrifice I'm willing to do for my baby who can't get vaccinated yet.
But going to a basketball game and trying to cheer for that long in the KN95 would be agonizing.