Jerry is the best, most interesting character on Rick and Morty
Not really, I just couldn't help myself. Jerry is terrible.
I really did enjoy Rick tearing him apart in the Curly Whirly episode, I know someone like that in my real life, but I never realized how predatory they were and how they used their insecurity and whining to manipulate the people around them. Its weird, the concept of someone using their own pathetic-ness to gain advantages over other people. Hearing it just slashed apart and opened up by Rick sort of opened my eyes.
I also think his resentment of Jerry may be why he was so stand-offish of Summer at first. He really avoided interacting with her, she even picked up on it and tried to get his approval in the episode where they split their reality. I think Rick initially didn't like Summer, because she was the reason Beth married Jerry. He has some comment like "You got Beth pregnant! She could have been anything! She was Rick's daughter!"
I feel like he didn't have those feeling towards Morty, because the damage was already done, but Summer had to earn his attention more because of her conception.
Random thought. Jerry is the worst, but Beth could be sure that he would never leave her (like Rick did) unless she was the one who pushed him away. Rick coming home and giving a level of commitment gave Beth the strength to leave Jerry (even though she made him be the one who physically left). She's always been the most attached to him in the situations where Rick let her down. Jerry has literally been preying on her since the very beginning, parlaying her heartbreak over her father into 'love' for himself.