overdo it
To do so much of an activity that it becomes harmful, detrimental, unenjoyable, or undesirable. I think I overdid it on the decorations—now the house looks downright gaudy. I know you're keen to get back into the gym, but don't overdo it or you'll end up hurting yourself.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.