Brakes pulling to left

the greatest advance of disc brake engineering is a straight line stop.
About all you can do is make sure the cable guide still has the little neck on it that holds it in the shoes hole properly. Beleive it or not, such a tiny item can throw drum brakes to one side. Same applies to a hardened steel thrust washer in the adjuster. Loose that little washer and the adjuster will refuse to turn allowing the adjust paw to wear teeth from the star wheel.
Bottom line, closely inspect every piece of drum brake hardware large and small.
All most forgot... the cable itself has nearly zero stretch so that is not the problem.
Good luck