Was installed correctly I'm fairly sure. Was done by a mountain bike shop my Co worker had been going to for decades. By quickly I mean around 6 months to a year. I've never had to replace one before standing on the pedals like that.

When I took it in to get fixed (didn't have the right tool and probably wouldn't have done it right anyway) the dude told me the bearing was basically crushed and asked if I rocked back and forth at the lights. Told me not to and I've never had an issue since.

As for standing on them while climbing hills, maybe it wears more evenly?