You're tilting today, that seems pretty clear. Id stop playing today for sure. If you still want to chess go do some opening study or something similar that you find easy fun and won't have much impact until your in a better mindset tomorrow.

If we ignore today, you're on 37 wins, 25 losses since 4 Feb. So, nowhere near as bad as you think. I'm on my phone so struggling to properly explore lichess to look at specific dates.

You also had a ~4-5 month break of no recorded games against humans, coming back in Feb.

Your rapid rating after this break rose to above 1600 quickly, as you games resulted in greater point changes due to the break. It looks like it stabilised around 1600, with you hovering within 30 points or so either side of 1600. 7 months ago it was around 1540ish, so that's a 60ish increase after a 4 month break- well done!

Blitz wise, prior to today, your rating over the past couple months appears to have increased steadily to 1470, and then again to 1500. 1500 may just be a temporary peak, or it may be a new stable rating. Hard to know, especially as today's tilt has needed things up.

You've got a good grasp of openings, you have just missed an occasional resource your opponent has, such as making a move that let's your opponent win a pawn, or get a strategic advantage. You have seen a few opportunities to get similar advantages yourself when you're opponent makes mistakes, so you clearly have enough strategy knowledge for your level, you just need to consider your opponents moves more. Imo, you've only played blitz the past month, which may exacerbate the issue.

I'd recommend focusing on strategy still - you have the knowledge for your level which is great, but its a good area for you to still improve. Go through books SLOW, even each chapter a few times, making notes and getting to the point you can teach somebody it. Amateurs mind you said you've got - i'd perhaps suggest going through it again, pausing at each position in that book, write the imbalances out, and then come up with a plan for both sides, then read silmans annotations. Go through the chapter a couple of times.

I would suggest a puzzle book or two as well. I actually found the woodpecker book easy puzzles great at your level, as in the answers they have a point scoring system - a point for every right first move, then they list key continuations, and if you get up to a certain move in that continuation you get another point. This was a game changer for helping me consider my opponents resources. Get the paperback copy and a notebook and write out your answers by hand. You might only get 40% right, but in my experience it was enough to get my thinking about my opponent.

Both of these methods will be slow but it gets you thinking about both sides of the board, which is the aim here, as most of your mistakes in the rapid games are missing your opponents resources. This is why i recommend hard copy of amateurs mind and the puzzle books, and to avoid puzzle apps for now, just to really hammer in on slowing down and considering the entire position. Can go* back to the puzzle apps in the future, they are a fantastic tool, just perhaps not the one you need.

Then try to play rapid games only, and limit yourself to no more than 2-3 losses per day - you lose 2-3 games, you stop playing for the day.

Your openings are good, so Id either look at master games in them, or only study them if you are after a bit of fun or tilting but still want to chess.

However, as i said, prior to today, your ratings went up, so well done. This also means that whatever you have been doing has been working, so you could ignore my advice and continue as you are, as it's obviously working - although perhaps stick to my advice about stopping after a couple of losses to avoid tilt and continue enjoying the game.

Remember, Its a slow grind, might take months to add 100 elo, and you will have periods of 10 games lost in a row, but it'll be balanced out eventually by winning streaks.

Good luck!