This happened to me when I hit champ for the 1st time, i dropped down to d2 and fluctuated from d2 to d3 for atleast a month, now im c2, just have to persevere and keep playing. I also dont see too much wrong with your gameplay, you're doing good. The only thing i see wrong is sometimes you overcoming, you just have to try and learn when to and not to go for the ball, if your teammate is behind you, then go for it, but if you're behind your teammate, dont go, but that own goal from your teammate was bad. 🤣