Yeah, as said, BB isn't bent
Often the spline between the crank and bashring is VERY tight. If you have the tool (sounds like you do) take the crank off, then the lockring off (silver ring with 8 square 'holes' in it), remove the bashguard. Check for any signs of wear.
When re-fitting, get the bashring fitted as far as you can by hand, then put everything chainring side down on a wooden bench. Give the end of the crank arm a good smack with a mallet, keep checking that it's going on straight. Then fit the lockring AFTER it's finished bottoming out.