Who said "I've done some terrible things, but I'm trying to be better."?

This quote is attributed to Guardians of the Galaxy.

I've done some terrible things, but I'm trying to be better. - Guardians of the Galaxy

"I've done some terrible things, but I'm trying to be better."

Guardians of the Galaxy Perseverance

"I'm your friend, man. I do this because you're my friend."

"Sometimes the thing you fight the most is the thing you need the most."

"We are Groot."

"You're welcome for saving the galaxy, by the way."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."