Got some questions, i've tried a mq and failed at the doors/keys, i'm about to try another mq and i still want to know. Is it just the doors/keys and its just luck, or is there combat involved in a mq?

It's 100% luck.

tell me about it, i just failed for my second time.

unlucky

100% luck. People that tell you
it's combat related are just trying
to get you going, make you worry.

When the third door finally opens be prepared for Pinky.