This is getting to a good solution. I also think 2 way opening doors would detract from the realism and the experience.
In real life if you try and open a door when you are in the way, the door stops, so same should happen here. So you either have to make sure you're not in the swing path to start off with or if it opens and you're in the way, it stops opening, then you move to the side or back and e.g. double click to continue opening the door / gate or single click to close again. Should be reasonably simple to implement and should work and retains realism. Same if it hits another object, like infected or vehicle, the door gets affected, not the object.
Also have an option for fast (and loud) opening (eg double click) and slow and quiet opening (single click). You could use the character-blocking-the-door-mechanics to control the door somewhat with the character, nudging it shut or open, turning this problem into a positive aspect and one that mimics real life more. Also open doors can be be moved and even slammed shut by the wind, and be affected in other ways by the environment, rather than just being fully open or closed, and have varying degrees of creak or noise to them.
