The episode opens the question about love. Rick claims that love is just a chemical reaction, but what he really tries to cover is that he failed with love. Love “hits hard then slowly fades leaving you in a failing marriage”. He also states that he’s not proud of it.
By putting Jerry into the idea that Beth is cheating, Rick seems to know a lot about the cheating spouses. We still don’t have a faint clue as to what has happened to his wife, but I will speak of some theories later.
This episode turns out to be a mess, as the whole world ends up wanting to fall in love and kill Morty. But that shows us another aspect of Rick – he would never admit his own guilt (as he is guilty after all).
So much so that he’s blaming Morty for everything that happened, and more.
Rick is too prideful that even after the whole world goes to hell, he’d rather ignore it and escape than admit he’s wrong. In a weird way, Rick is rubbing his guilt on Morty’s nose, making him feel guilty but at the same time we are also aware that Rick knows what he’s done.
On the other side, we finally find out that he left Beth’s mother, as Beth states it.
In the end, we witness Rick and Morty pass to another reality where they previously died.
Rick then expands on multiverse idea and how nothing really matters. He is presented as not caring about what they left behind and we get the feeling that his knowledge is actually forcing him to ignore many things in life.
Rick is also showing traces of sociopathic and psychopathic behavior here. He cold-bloodedly buries “himself” while making Morty do the same, then slides in the house and chills with a can of beer, not even paying attention to Morty, while Morty is freaking out.
Rick shows no sense of guilt about the family or Morty, but we will later witness some events that will prove Rick isn’t really a sociopath/psychopath.