Move on
I've had the opposite experience squire. Went for a H269 endorsement & got it despite making a complete mess of the day. As a thousand hour R22 pilot, I just couldn't get the hang of a machine with no governor. I never sent the paperwork to CASA because I'd already made up my mind I wasn't comfortable with this machine & we all have final say of where we're at as pilots.
Where do you feel you're at as pilot? That's what counts every time you climb into a cockpit. If you think you're response time is too slow do it again till you're happy with it. If not, write it off as a bad day and move on. What ever you do don't let a bad experience hang over you like you're own personal rain cloud because it can effect your cockpit behaviour.
The flying game could learn a lot from sports psychologists. The Sport types spend zero hours weeping over spilt milk, it's all positive with those guys and they're right. Focus on the strengths & fix the weaknesses.