Dude, the first day I was back in the gym after a surgery where multiple pieces of my spine were removed from my body, I pulled 135x10. I beat your lifetime max within like two months. This isn’t to insult your work, but rather point out that you have absolutely zero credentials to judge deadlift technique.
Do me a favor and Google Arnold Schwarzenegger’s deadlift. Or Ronnie Coleman’s. Or Tom Platz’s squat. Or any of them, more or less.
OP - good luck for your competition. You’re moving some solid numbers : )