You won’t thank me so I will praise myself

Wow, I was good to you.

Even with your sea of disappointment. You had that long before I arrived and you jealously guarded yours like a cornered python.

You did our banking and I tolerated it even as cash went missing and checks bounced and my credit rating suffered.

You could buy or do or pursue anything you wanted. I supported every single one, as long as they weren't designed to specifically destroy me (there were far more of those than I understood).

I tried not to react to your constant conflicts and profoundly one-sided self-justification.

Your unwillingness to accept how badly you hurt your parents. Your dad may have deserved it. Not your mum. The poor woman was cornered between two raging narcissists! 

I didn't question your aptitudes until you got so ferociously mean at the end.

You have Addison's but no one has had the courage to tell you that you can't accurately assess others' intentions. By medical definition, you cannot read others.

You can't tell jokes and you can't shut up about yourself. And you don't know how connected you are to your mother. Figure that out soon before it destroys you.

You compete with your friends and suck up to people who manipulate you. As a result you hurt and annul lovers, and you aggrandize and empower bad actors.

I'd discuss "us" using first person voice, but that implies a listener, and your ears are turned off. You believe you can multitask others' emotions and you're proud of your cleverness. You can't multitask and you should be embarrassed.

You can’t say thank you because it burns your skin to pass an iota of attention to others.  You are addicted to the spotlight but it’s so dim now and you are scaring yourself to death as it goes to black. 

You’re welcome!  I know you so much better than anyone on the planet and I loved and cared for you like no one else. Thanks to me for doing better than anyone else ever will the the problem of you.