Why are scammers many on Bybit so much like this, the way they are sending lesser amount of money is too much.
If you have noticed that there is an increased number of scammers on an exchange you use for P2P, perhaps you should explore other options, but mind you that will not completely eliminate the possibility of you getting scammed. You could still get scammed in the other exchange that you're moving to if you are not careful.
For the situation that they sent less than the agreed amount, do not agree that you have received the money, and then report to support.
What I have encountered on a P2P service is buyers negotiating to pay less than the price displayed to be paid. I think many of these people think that you obtained the crypto you have through dubious means and you will not mind losing a few of it on the way to you. I always report them.