I don’t have kids so I’m not going to pretend I know anything about being a parent but there’s a book by Angela Duckworth titled Grit.
The book talks about the science of staying with a hobbie and how some of the greatest in the world was encouraged to stay with a subject, hobbie, or sport when they wanted to give up.
Angela has two daughters. Her rule with them is they have to stay with what ever they choose for a year. When they reach high school, it changes to two years. This puts her daughters in a position to really think about what they want to do next with their lives.
People quit on things too early to know whether they enjoy it and/or are good at it. This is especially true for people with ADHD. Having ADHD doesn’t mean that person cannot commit, it can also mean hyperfocus can kick in after a certain amount of time with an activity.
Resentment can go both ways. People resent their parents for not believing in them, or letting them quit when all they needed was encouragement.