You are the defeatist: you seem to think people cannot get better without suffering. The article just states that to actually be better, a good starter is to

You are the defeatist: you seem to think people cannot get better without suffering. The article just states that to actually be better, a good starter is to remove the useless comparison with an idealized future self, because it brings no good and it’s actually harmful. At no point to actually stop trying to be better