Mentally unable to improve

I'm really no one to give advice because I just started playing again after about 25 years. but back then I beat people up to about 1300 rating. now I'm starting all over. my biggest problem, is I have zero patience.....basically ADD. coupled with an aggressive style, and having forgotten end game tactics using different piece combinations

I would imagine that after 7 months of speed chess, and no improvement.  Wouldnt the idea of trying something new come to mind?

anyway....take time, play longer games. slow down, actually look at the attacks and support of every pawn and piece on the board. and practice end game tactics

For myself, its better to play longer time control games, it gives more time to analyze your position and tactics.

For Opening other than learning the basic of the opening that u want to play, its also helped me so much remembering and practicing basic of opening principles https://www.chess.com/article/view/the-principles-of-the-opening

And futhermore, tactics tactics tactics.

I think the lessons on chess.com are amazing and you could benefit a lot from them as a 1200-1300 rated player. There are so many of them that you haven't seen. Skip the basic ones and do the rest. The longer lessons that aren't from the Chess.com team are even better, since they are sometimes almost 30min long per 1 unlike the short basic stuff.

Okay so I may not be the absolute best player, but I would consider myself pretty decent. (I don't have a rating on this account as I have another account to where no one can know that i've actually lost games before!) I started in summer can't remember exactly, I haven't been taking it too seriously, and like up until last month I kinda forgot about chess after playing it for a few months. The thing is my problems come with concentration and mental clarity, if I want to win a match and really try, I will win that match. I have beaten a few people rated quite a bit higher than me so that shows that. Anyways you shouldn't really view the beginning in openings, openings help the game go quicker and put less stress on your psyche, but they aren't essential. You don't have to stick exactly to what you know. Just analyze what is going on and what to move. Stick to the basics if you want like developing pieces with tempo, and capturing the center and all that. Just realize chess is a game about simple piece movements that are all done to endanger the enemy king. You may or may not want to think like a machine. Machines do best in chess as a computer can be specifically programmed for only chess in mind, and the basic way a computer works is best for the simple yet numerous calculations you have to make. Openings are a way of using the brains natural mechanisms to your advantage, thinking more abstractly is a lot less taxing and efficient then going over every single move. Yet it's not as effective. It gets you around the area which is good enough, but not the absolute best. If you are having trouble with concentrating like me, try meditating. Breath in more then what you would normally do while playing a game so your brain has enough oxygen. Always work on your tactics, so you can see and recognize something to do (this has to do with what I said earlier as to how the brain works) and don't play too little or too much. Like don't play ten 30minute games in a row. And don't just play 1 game every 3 days or something. You want your mind to recover after a game, so maybe meditate inbetween matches, or just do something else productive like exercising which also improves your brain function. If you were to take chess seriously, you will for certain make progress. That's up to you if you want to though!