Quitting dating apps may give you a temporary reprieve, but online dating isn’t the issue.
It is always a good idea to improve yourself to make yourself more appealing, whether it be physically, mentally and so on.
Clearly, you don’t feel good about the person you are at the moment. You know that you have certain areas that need some work. Perhaps the fact that you aren’t entirely happy with who you are at the moment is causing you not to get likes or matches on dating apps.
Yes, other people can sense it, even on dating apps.
Work on yourself for a while so as to get to a place where you feel better about who you are, not just physically, but also mentally. This increases the likelihood of finding a romantic partner, whether it be on dating apps or in person.