Most people quit pretty quickly.

In their mind it isn't quick. They say things like "I've tried everything"
Sometimes it takes years of trying.
Sometimes you have to change direction.

But the final goal shouldn't ever change until it is achieved.
Some people make jokes as an excuse.
There's nothing funny about losing. Get serious and make it happen.

When you quit, you are starting over.
You are starting something new.
You can always take what you have and use it to your advantage. Everything you've ever done serves some purpose.