It depends on the type of loss. I would forget very easily a loss where I have deposited 25 dollars and I did like 5 super bonus buys of 5 dollars each, this is achievable with IDR as currency to buy the super bonus with 5 dollars in most Pragmatic games and lost all of such buys. What I won't forget easily is again a deposit of 25 dollars and start with bonus buys again but this time I go up to 800 dollars and because of the greed I lose everything. This is something very hard to forget as I had all the options to get a withdraw and get away, even enjoy some of that money. These type of lost sessions are very difficult to forget as you completely mess up yourself and this is very difficult to get past, you keep saying to yourself, I have to stop and you can't.
To me, this seems like a fundamental bias in gambling psychology, loss aversion, and the sunk-cost fallacy. I am talking about losses, basically big losses, that hurt more than wins feel charming, You know, it just creates something like emotional pain when you blow a full 800 dollars instead of walking away. The more money you stake it will become harder to stop, and finally leave you with a 'gotta get it back' mentality. Yes, you could avoid this just have to strict on your rules, We have to consider each session as its own budget. Even if you lose it is just entertainment costs, if you consider it as failed comebacks, no one could help.