This sounds to me more like burnout, or a form of tilt which is prolonged. I've experienced both before. Here is my video which covers all 7 types of tilt in under an hour and how to cure them. I hope this is well worth your time investment long-term with all the time (and efforts) you may save by not tilting in the future:
How to deal with tilt that has been remaining for a long period of time?
@1
"I lost an intense game which took a toll on my mental capacity as it was a 30-minute rapid game, then lost 3 blitz games consecutively"
++ Do not play after a loss, instead analyse your loss to learn from your mistakes.
"I resigned on one blitz game literally after 2 moves" ++ You should not have played it at all.

This sounds to me more like burnout, or a form of tilt which is prolonged. I've experienced both before. Here is my video which covers all 7 types of tilt in under an hour and how to cure them. I hope this is well worth your time investment long-term with all the time (and efforts) you may save by not tilting in the future:
Watched your video, would definitely try the 646 breathing, I believe that it is true that it could be a burnout, and that just taking a resourceful break is my actual and only priority, where I take a break from playing but still studying and doing puzzles in order to ensure that I do not impair my ability from being inactive in chess.
"I resigned on one blitz game literally after 2 moves" ++ You should not have played it at all.
No sh1t captain hindsight
Hello, the title says it, how do you deal with tilting for a long period of time? I tilted a few days ago and still tilting, so I decided to take a break off for an entire day (Went for a holiday, field trip) in order to refresh my mind from chess, but after taking a break for an entire day, I lost an intense game which took a toll on my mental capacity as it was a 30-minute rapid game, then lost 3 blitz games consecutively (It was supposed to be 4 blitz games, but I resigned on one blitz game literally after 2 moves because I couldn't handle the stress anymore, so I cannot really consider it a genuine game.)
I would often be deep in thought when I calculate, or if I inspect a combination that I assume is intuitive, I would be calculating or inspecting for such a long time that I would often get distracted by the action of calculating itself and just forget what I was supposed to do, and this is where I most often start tilting, especially if the game looks important, like a 30-minute game.
What do I do with this situation? It feels like no matter how efficient or effective I study or practice, it all just ends up with my mental health, and my psychological capacity.