I think a lot of these pet hates are unreasonable as the OP admits by her thread title!
Like other lifters, I may be using 2 different dumbbell sets because I’m super setting with different weights or I’m doing a drop set.
And rest between sets for me is between 2 and 4 minutes. I lift properly heavy.
And I grunt and drop the bar - if you’re doing multiple deadlifts at 90 kilos using the “touch & go” technique- well, yes you’re going to make a noise on the down bit of the deadlift.
And I do intervals on the treadmill usually so will have it running while I’m doing something else with dumbbells- “active rest” between fast running intervals.
If I do an aerobics or a Zumba class of course I dance it out. It’s fun! As long as I’m not getting in anyone’s way, what does it take from you ? What harm does it do? Or are you just envious that someone can do the steps and is fitter than you? If I’m in a group class with someone who’s better at it than me, I love it - I learn by watching them and it gives me something to aim for.
But at the moment, I have a slightly damaged knee so I’m rehabbing. I do use the treadmill at a walking pace to get my steps in in as low-impact way as possible, and to keep up my fitness somehow. So yes I might be on the treadmill walking for longer than some posters think is reasonable. But those posters are the unreasonable ones, actually.
So posters complaining about these things really are a bit ignorant about the variety of ways that different people use the gym.