A good sleep and hitting again the next day can do wonders. Let that brain soak and defrag overnight. I could not even tell you the number of times I'd get bodied all night, then win like first or second try the following day.

Similar to the advice of others... But yeah a break really does wonders. Sitting there getting cranky rarely helps performance, but coming back cool, calm, collected with the experience of the fight makes a massive difference.