fuel pressure dropping over time

diymirage said
That is no where near a 90..I would have noticed a 90 on first assembly
That's maybe 20 degrees?

Either way, it will get dealt with

I dont believe that the hose is "heating up" and kinking. Once a hose kinks it stays kinked they dont cool off and magically straighten out.
Yes get rid of the kink that will help.
Your problem lies elsewhere my educated guess is back at the tank.
Keep looking and Good Luck