When you have children you love them unconditionally but sadly I am afraid that often it does not mean that you actually like them and how they turn out. Sometimes you have to be a toughie if you want them to live up to their full potential. It does not seem that your elder son is managing very well at present. It would seem there are no absolutes in his life and he clearly thinks that he has no boundaries and no responsibilities. This is where the parents come in as it is part of their responsibility to put in place the absolutes.
I wonder if you have taken into account his brother's feelings regarding all of this. I fear that you may be storing up problems for the future. When you are no longer here to keep the peace the family left behind may well be totally fractured. Your younger son may well take a very strong position to protect his own little family and your older son may well be left out in the cold. Who knows? You have no idea what will happen and this is why you need to prepare your 'man child' to be self sufficient. You may not know but estrangement is a very unhappy scenario and could be an unintended outcome when the family dynamics are in a mess. Estrangement can happen even when there is only a perceived favouring of one sibling over another but you know that is not the case here.
Clearly you do know that as a mum you actually need to sort all this out. Nobody likes to be a kill joy but there doesn't seem to be much joy for any of you in the situation as it is at present. It needs to change but as you are posting on here then you clearly already know this. 
Things that (sometimes unreasonably) get on your nerves...hopefully lighthearted


