Hardstuck Gold IV help needed

So ive been playing lol for about 8 years, but only at season 7 I started taking it seriously and climbed to Gold, This season I placed bronze 3 climbed gold easy in 2 weeks, but then I had massive losing streak I think I was pretty tilted, but now I've been trying to play games well, but I lose every single game if I win I gain 15 lp MAX and I lose 20-22 Lp, I hate this last game had 2 Dc's which motivated me to write this, I usually win my lane go like 4/1, but then my bot feeds (yea yea classic low elo idiot who doesnt know how to roam, or have map presence), thats not exactly true I watch a lot of coaching videos, such as LS's videos, and overall videos about CS, map presence, trading, champion guides, Okay and the thing is I know how to play my champions look every game I win lane, but I lose the game, or I win like 3 games lucky and then go back to 0 lp in 3 hours. So if anyone could help me i'd appreciate it, I know I have bad mentality I guess, I watch replays every single day, make notes, why did I die, should of I've been there, Did I place enough wards, etc. Tell me what I'm doing wrong pls help, im desperate, im thinking of just making a new account, but this is my main account with the skins, champs, rune pages etc. Edit: my opgg https://euw.op.gg/summoner/userName=Iide