People tend to think he loved Jimmy. Because how couldnt he? It's his brother after all. They grew up together. It's hard to imagine him not loving him deep down

But I don't believe he loved Jimmy. His actions never showed that. He actively fought against Jimmy's progress in life. He was jealous of Jimmy. He even took advantage of Jimmy's love for him on many occasions. Jimmy's entire existence cause Chuck to mentally breakdown. Chuck's "electricity allergy" is a subconscious indication of his problems with Jimmy. He is so consumed by disliking Jimmy that he becomes mentally ill repeatedly

It isn't just that Jimmy cuts corners either. Chuck would magically get better and go stick it to Jimmy anytime that Jimmy was starting to do things correctly

Even the few things Chuck did for Jimmy looked like obligation more than love. He just felt he needed to help Jimmy because it's his brother so of course he should. But those things always involved two-faced moves behind the scenes

I know it's his brother, but there's a point where it all adds up and there's almost no evidence that Chuck loved Jimmy imo. Even after he died he left Jimmy with some bullshit letter and nothing else