OP, this sounds like such an uncomfortable situation. I do think the person was rude, but I also know I'd feel horrible if I'd missed someone asking me to move.
I'm not deaf, but I do have ADHD, this means that in busy shops where there are lots of people talking, music is often playing, and there's lots of movement happening I can find it very difficult to focus on the 'right' thing. So if I'm paying I have to put all my energy into that task and zone out everything, and everyone, else.
If it had happened that I had inadvertently ignored someone (disabled or not) I would of course apologise, I would not expect them to be rude back. The person could have got your attention another way, a tap on the arm or a shift to the side to be in your peripheral vision.
Politeness doesn't cost much, and "well people are rude to me a lot" isn't an excuse to be rude to others.
As for the lift thing, if it's a disabled lift that is being used by everyone then absolutely complain, but if it's a lift for general use then you have to wait your turn like everyone else. I can understand this would be frustrating, I have missed trains due to having to wait for a lift or hurt myself quite badly trying to juggle luggage in train stations with no lifts (I don't tend to use lifts other than in train stations). At none of these times have I felt the need to scream swear at strangers, even at times where I have been practically crying with frustration and pain.
Being disabled absolutely sucks, and I'm not even in a position of having to rely on a wheelchair and navigate places that are inaccessible, so I can't really imagine how hard that must be. But being disabled is not a carte blanche to treat people horribly, even if you're annoyed.