Yeah, deadlift form can vary a good bit depending on your body makeup. People will tend to have bad form due to lack of body awareness and missing that mind to muscle connection that is needed more than you need for more straightforward lifts.
Your deadlift weight seems to be somewhat inline with your other lifts. Your squat just seems really high in comparison.
When I first started deadlifting I had stupid bad form. My non lifting hips/lower back posture was terrible from sitting in a computer chair way too much. I would get whatever friend I was lifting with to film it so that I could actually see a side angle of where I was going wrong (you dont want to try looking at a side mirror while doing it).
I also tried my best to stay at a lower weight until I could consistently pull with form I was satisfied with. If going to heavy is forcing bad form and things are firing off out of sync itll hold progression back.
Being that it works your whole body there can also be a lot of points of failure that could be hindering progress as well. I'm sure you have read a lot of this stuff elsewhere. Just throwing out my own personal experience with um.
Took the filming advice and had a friend film me doing it at various weights, was able to get some help from the gym owner using the film without having to shell out extra, so that was helpful!
My squat's probably pretty high from a lifetime of being a fatass
Came to weightlifting with those useless nerd arm-noodles, so my legs were probably the only thing getting worked before that.
A lot of what I ended up having issues with were largely leg and hand orientation/placement. I was starting with the bar too far forward, because my legs were too far apart, so the only way I was grabbing the bar was by leaning my arms out past my legs while my knees were out.
Did you fail the deadlift because of difficulty driving up or was it more grip strength? I always hit grip strength walls rather than actual posterior chain strength walls with deadlifts. So I started doing Kroc Rows and those have helped immensely. Farmer carries always bored me.
Grip strength is definitely an issue for me with the deadlift. Before I switched to doing hypertrophy-level amounts of accessory work I basically never felt tired or "burn" in my legs/butt, it was always my hands hurting/going-discolored by the time I was "done" with the straight 5x5 style "lift the heaviest you can" sets. The lower weight and higher reps/sets on 5/3/1 has helped a bit, as my hands don't seem to tear as much at ~10-15% less weight, but I definitely feel like I need to find some accessory to do that increases hand callusing/grip-strength. I tried out the kroc rows this week and they seemed good.
Weirdly, my traps are the only upper-body muscle that was actually visible/developed before I started working out (at the 6 month mark I can now actually see other muscles when I flex, so that feels good, even if there's a flap of flab hanging from the underside of the muscle shelf). I assume that's from hauling around piles of books, computers, and 5000-count cardboard boxes all day for years like a good little nerdling.