Recaída literally translates to "relapse". It's a word often associated with falling back into old habits, especially in the context of addiction or illness.
In this song, the artist cleverly uses it to describe a romantic "relapse" – repeatedly going back to an ex-partner despite knowing it's not good for him. He even personifies himself as "o super recaída" (the super relapse), making it a unique and memorable play on words.
"Super Recaída" pokes fun at how hard it is to move on from an ex. The singer says other people can end a relationship and forget about it fast, faster than the Flash. He can't. Instead of a superpower, he has a "super relapse": he drinks, calls, and ends up back at her door every time.
He plays with the superhero idea throughout the song. If he were a superhero, his power wouldn't be flying or strength. It would be chasing after the one person who keeps hurting him, no matter how many times he tells himself he's done.
The song is light and a little self-mocking rather than sad. It captures that familiar feeling of knowing a relationship is bad for you and going back anyway, and it makes a joke of it instead of dwelling on the heartbreak.