Is It Too Late to Change Behaviour?

Is it possible to make up for all the years that they were given this negative reinforcement. Do you have suggestions for young adults who haven't gotten positive reinforcement in school? M they were only told they were lazy them these children, or are there any other ways of improving their self-esteem and confidence? Am: I think it's very important fo young people with a d h d to identify things that they are good at, and to have the adults in their environment help them set them up to succeed at those things.