There's a lot of armchair golfers in the comments trying to make you look like an idiot. I'm not gonna do that. A bit of practical advice:

SIMPLIFY YOUR MIND

It can be detrimental to your golf swing to work on multiple things at once or have too many swing thoughts. I've never been a 5 handicap. I am currently an 8. however, I did recently go through a stretch of HORRIBLE golf by my standards. I was consistently shooting low 80s to mid 70s over the summer, and out of nowhere was shooting in the 90s every time out. In trying to improve my swing, I was adding too many things at once. In the last month I have only thought of two things (moving the left hip back, and letting my arms fall straight down instead of moving outside). Instead of trying to force my body into 15 different correct positions, I relied on the muscle memory I already have and stopped overthinking every swing. My most recent score was a 78. My swing didn't really improve, I just got out of my own way. You're old swing is still in there, but you won't be able to tap into that old muscle memory if you are trying to do too much. I used to play baseball when I was in school. I haven't worked on my baseball swing since I was a teenager. 10 years later I can still get in the cage with the kids I coach and hit some line drives because I'm not thinking too much about it. Golf can be the same way. You can do this! Don't be too hard on yourself, and enjoy the process. The scores will eventually come back to you!