Each time I try to open a door using the "nudge" button, the door opens for like... two inches, and I have to try again for like a hundred times to hope to pass through. Anybody got that problem ?

I have kind of a similar issue.
Most times, a person I killed is right next to the door, and I have to wait a few minutes for it to inch open.
But, if there is no body, it opens faster.

My problem is similar, except I can't get close enough to the door to actually open it.

Gog support took about 5 days to get back and just said to update my graphics drivers, which didn't fix a thing.

Here's a video: https://www.youtube.com/watch?v=Yg5Daa7h2aw

OMG
HUGE issue now!
Finally got to elevators, and it takes (no lie) five minutes for the levators to appear.
FIVE FREAKING MINUTES! Sometimes MORE than 5 minutes!
Sometimes I have to press the button, walk away for 5 minutes, come back, still no elevator, press the button again, go away for 5 minutes, still no elevator, and repeat it one more time before the elevator doors open. Thats 15 minutes, just trying to get 1 frikin elevator to work!
And then, its another 5-10 minutes inside the elevator for it to reach its destination!
This is unacceptable!!

I watch youtube video's, and the doors open instantly and the elevators appear instantly!!!

Not for me though.
:(

This has GOT to be fixed.
I was on one level for 2 days (the water level), because I kept hitting the button, and I would hear something, sounded like on the other side of the wall, so I would go running all over the map to find what door opened, only none ever did!