Actually, I also use my mobile phone as a training record when I go to the gym. But the subject may not be talking about my situation. So:

1. If the subject feels that he has influenced your use of equipment or mats, you can politely go over and ask him if he can take turns using them. After all, when most people do training, the rest between groups is enough for others to do a group.

If there is any extra equipment, it's someone else's business, so leave him alone. ...

Then what kind of psychology may they be?

Maybe exercising alone is boring, or you don't know how to practice, so you can't concentrate on training.

Maybe I came to the gym for psychological comfort. In fact, I didn't spend too much time training seriously, just to kill time.

Maybe you just can't live without your mobile phone and have formed a bad habit.

But whatever the psychology, if the subject thinks this behavior is not desirable, just encourage yourself. Don't waste your time speculating about other people's affairs.

I wish the topic owner success in fitness.