DL misses (or PRs) take a lot out of you for sure...
Next time I hit a heavy DL PR or miss, my plan has always been to stop there.
A heavy miss has your CNS telling your body that it's at it's limit (for the moment at least) and will naturally restrict our abilities temporarily...
Point being, I'd say it's totally normal and you still did a sh!t load of work before and after!
"You must have a very strong reason for doing an exercise. If you don't, scrap it and move on." -Jim Wendler