Bitter sweet, I know the feeling. When I get a little down about not being where I was at one time I take a quick reality check. How many 53 y.o. are singling 315 in the bench? Not many at all! No compare yourself to the average 53 y.o. out on the street and you'll really see the gap you put between yourself and them.
What do your hear from 99% of the guys who enter their first, even second PLing meet? "I'm just competing against myself". I tell them that's a good approach for now but one day, you will not be able to compete against that guy.
Keep the fight up and do not go quietly into the night!