Question for parents - How to handle situation with brother.

Good Morning!

I am wondering how to handle a situation with my 16 year old brother. He is pretty much the biggest slacker I know and is constantly taking advantage of everyone in the family. Despite this, I am constantly trying to give him a chance, only to be let down. He lies constantly, never does anything he says he will, and has massive gauged holes in his ears, so it is very hard to look at him and take him seriously. Then he has the nerve to complain that he can’t get a job because of them.. anyway.

So a while ago, he informed us all that he wants to be a pastry chef. Which I think is great because he is going to attempt to do something. He has always enjoyed cooking so it could be a good route for him. I have been behind this 100% and have been having him over to learn a bit about baking and different techniques for things. He has seemed to enjoy coming over, but today, the day that we have planned to do a huge cake… (3 tiers 9 layers) He texts me this morning and asks if he can push our time back an hour.

My dilemma is, do I let him push it back? Or go pick him up at our scheduled time? How would I talk to him about this when he gets here? I baked constantly for the past 2 days to have all of the cakes ready to decorate today… Or, is this just teenager behaivour that I should live with? I am really lost. Because I have pretty much always been his biggest supporter, and have been able to share my thoughts openly with him but I am afraid of doing it the wrong way. Because he has no respect for anyone’s time.. or anyone/thing in general.

Is it just that generation?

I’m lost.