To SIL, who is married to complete waste of space:
"Just leave him. He adds no value to your life. You are either working or looking after DC. You spend your life supporting him emotionally and financially and he doesn't do anything to support you. He resents fatherhood, and makes you feel guilty for the fact that he has less time and that the two of you can't go out. His constant weed smoking is not healthy when there are young children in the house and the fact that you can't see that is how much he's messed with your mind. He will NEVER finish his qualifications because he's too lazy/stupid to do it and that means he will NEVER change jobs so he will simply continue to whine and complain to you while expecting you to bear the brunt of the financial burden.
And all of these things turn YOU into a not very nice person. You are defensive and easily angered with everyone, including your DC. We all KNOW it's because you literally don't get 10 minutes to yourself and are juggling 1000 balls, but it's tiring. And every single time you shout at him because he's being a dick, you somehow land up being the bad guy.
DC will be FINE without him in their lives on a daily basis. So will you. It won't b e easy but you are not exactly modelling a fantastic relationship for them so keeping around is just going to harm them in the long run. Just leave. Please just leave."
Sadly, can't say any of that in real life as he's convinced her she's a terrible, cruel person who doesn't take his needs into account. Ditto, that he is a poor pathetic man who needs her and if she doesn't look after him, who will. Sigh.
Thanks. This was cathartic.