The phrase "worked too much" is correct and can be used in written English.
Example: She felt burnt out and exhausted because she had worked too much over the past few weeks.
The first wife he dumped because she worked too much.
"Maybe I've worked too much in my life.
I worked too much and I knew when I was tired, but you accept a lot of games and you work those games.
I married the wrong men, I worked too much, I didn't know how to be present; I didn't know how to be myself, much less model boundaries and attachment for my son.
The firefighters, who work for the National Park Service, Forest Service and Bureau of Land Management, were told in recent weeks that they had worked too much overtime and exceeded salary limits.
But the rescue committee's lessons proved useful, forcing him to think about unfamiliar interview questions like "What's your main fault?" He has been coached to turn that into a positive, saying he worked too much when he ran his own computer business in Baghdad.
