>>112866868both characters were designed to be a bit unlikable in the first episode, but Steven's unlikability was subtle, it was about a kid who just needed to be guided in the right direction, but wanted to be a better person to help the crystal gems.
meanwhile, Star Vs the forces of evil is just the kids version of girls who say 'I'm so weird and quirky!'. She tells you she is weird from the get go but according to the creator being 'weird' just means screaming really loudly and obnoxiously and being unable to listen to any adults. She actively runs away from any sense of responsibility.
Steven wants responsibility for the wrong reasons, but he purposely seeks out the wisdom of the adults in his life to try and become stronger so that he can help them. He is meant to be annoying, but relatable because his annoyance just comes from being a kid surrounded by adults. He actually has real interests, ones that would make other people in town think him annoying to be around. He obsesses over his favorite ice cream like its a TV show, he is into obscure cartoons that make everyone in his family feel uncomfortable, and when he does say something stupid it is often him trying to use the type of humor we see on TV, as he is a kid in a generation raised on TV.
Regardless of where the series both went, the problems with Star were present in the very first episode. Steven Universe ends on sentimentel failures that highlight the emotional journey of the show: burying the ice cream package (his childhood) and a promise to figure out his own way to become a successful crystal gem (an adult).
Star just ends with two people realizing they are both into violence as if they are the only kids in the entire world to ever like violence, even though the show was designed to cater to children who like violence.