Very good numbers!
I think you just started with too high a weight. You can't start at your limits and expect to make progress; you need some runway room. I would scale back everything and add weight back slowly. Don't worry, it's not wasted time. This will give you time to recover, groove your form and get you mentally settled into making progress again. I like to feel like I haven't done enough work, just motivation to slap on 5-more lbs next week
Since you were already doing 355x5x5, that's what I'd do on intensity day: 355x5. Your volume day will be 90% of that (320x5x5) as BGish1984 said. You will be at 405x5 in no time.
Regarding deadlifts, you were probably burned out, but the starting point was also way high. If your best in a meet was 440 then I'd start with 365x5. It may seem light, but it's plenty and will be going up 5lbs/week anyway. Again, you don't want to fatigue yourself with DL's and not be able to do squats either. Heavy DL's really stress the CNS, I've been known to skip them sometimes, but then again, I'm not 21
Are you pulling on your squat volume day? If so, I'd move that to intensity day. I'm usually pretty beat up after squat/bench volume, not to mention that it takes a long ass time.
After making the adjustments, give yourself at least a few months to gauge progress. Don't jump around.
I've been running the Texas Method for just over a year now. My squat started at 335x5 and in 10-months went up to 410x5. I'm much older than you (and a little lighter), so you should have no problems making gains.
Hope that's good motivation, good luck!