Yes, he thinks Bruce's method is not enough and Bruce literally didn't give him any reason to believe him. Bruce didn't give him any talk, any explanation, just this :
Attachment 97578
He literally let him be? Bruce literally let his 13 years old son, former assassin son, unstable teenager son to do as he please and didn't check him out?
Now let's imagine that you go hiking together with your son, your 13 years old son. You point him a good path to climb the mountain. When your son ask you, why do we must take this path, you answer 'believe me son, I'm more experienced than you about how to climb this mountain. This path is the right path'. You're right of course, no one will deny it. But what if your 13 years old son doesn't believe you, and say 'No! This path is too long! This path is not effective! I will find my own way to climb this mountain!'. Will you say 'okay son, I'll let you find your own way, and I'll come to you only when you do some mistakes' ? Or will you follow him, check him out, warn him, guide him??????????
Just, I don't care that as big hero he probably can't spend all his time watching over his son, I will say that Bruce Wayne is utterly, definitely failed as parent. Hell, like okay after Alfred died, if he want to starve himself, go ahead. But as father you have a responsible to gave your son something to eat????? Not only the money, you have responsible to provide meals on your house for your son?????? A healthy food, because your son is on development age so you can't just give him money and let him buy junk food for himself or something?????????