Well to be fair, I’ve certainly had some problems mounting a couple of tubeless tires (but Low as a percentage of all the TL’s I’ve installed). The GP5000’s that I just put on are absolutely the most difficult tire I’ve ever installed. This is my second set though and the longevity is definitely worth it.
also worth mentioning that once on for a few days if having to remove for some reason the difficulties were gone, I guess they stretch! But dang they are nasty to install on my LB wheels.