Fufu brought up some amazing points and i totally agree with all that.
1RMs are never pretty anyway. When i max out my thoracic rounds a bit too. Have been doing some work to strengthen that area and it's getting better, but a max lift is always gonna be uglier than a warmup. Those lifts in the OP are well within the boundaries of acceptability. Go look at Diesel Weasel vids on YT if you want real bad form.
1RMs are never pretty anyway. When i max out my thoracic rounds a bit too. Have been doing some work to strengthen that area and it's getting better, but a max lift is always gonna be uglier than a warmup. Those lifts in the OP are well within the boundaries of acceptability. Go look at Diesel Weasel vids on YT if you want real bad form.