Any fixes for a door that sticks, i.e. trouble pulling it open?

try this. If the door panels off it would be easier. Place a 5/16 ( i think) alle. Key in latch side of door. That will fit into a set screw that can loosen and tighten the hinge on the door latch. Spray your favorite juice in first ( pb blaster works, but not sure if can damage paint. Loosen that. Flick the thumb button a few times. Tighten. I read how to do that a few times and still couldn't figure it out. If the little hinge arms are dirty, they'll stick! So I was getting no adjustment. But when I put a new handle on, lubed hinge arms,I could see the thing slide over. At that point, with the button all the way out, and the arms making full contact, I got Full Travel on my latch, making the door open like I was a kid again. Hope this helps!
Ps mine was doing the same thing