His inability to accept accountability or self-reflect is as outrageous as it was the first half-dozen times he posted a similar screed. It's always "me me me," "this is how I'm affected," "you did this to me," "I want this, I don't deserve it but you need to give it to me," he acknowledges that he's a piece of shit but there's no meaningful resolution of that thought process. He's a self admitted addict and an abuser, but that (hypothetical) bitch whore owes him, because he impregnated her, because he took her on a ruse cruise through a dumpy drive-through wedding chapel, because he isolated her from her family and forced her to flee down to Mexico to escape the mess he made in the country they were born into. He made the lives of his first baby mama, their son, and her family a living hell at any point he could, because he's spiteful and openly revels in that fact. He's a malicious cunt to anybody who he even imagines has slighted him. What good could come of entertaining his demands? All he's going to do is whine and holler and nitpick and threaten with emotional blackmail. The Vickers tried to placate him and look what happened there. Ralph constantly gloats about being a "heel" operating on petty spite who goes as low as he possibly can, why should anybody give him the time of day, especially the woman and child he emotionally and physically abused over and over again.
The Morris family are doing the right thing by excising the piggy from their lives, for the sake of their own wellbeing and more importantly for the sake of his daughter.
Intelligent people in his situation (broke, alone, exiled, and in failing health) try to pick themselves up and show that people got it all wrong, that they're capable of change, of being responsible. Of doing the right thing and striving to be a good man. Not Ralph though, he's going to double down on being a violent, disgusting drunk and a drugged up weakling, because that's the easy way out.
Ralph got it at least partially right, he shouldn't trust anybody, especially himself.