Originally Posted by
FrejusFlyer
I don't think it's a compatibility problem as the right-side pedal went on the crank like butter.
Agreed, aside from the threads.
The first pic above clearly shows mishapen first couple of threads to me, sort of folded over instead of a centered peak like they should be.
The pedal axle is far harder than the crank so brute force properly applied would likely force it into submission but it might also split the eye in time.