I wouldn't say that Groot sucks. He sacrificed himself at the end of GotG and helped create Stormbreakerin Infinity War. And I like his relationship with Rocket.
However, he's little more than a cute presence. Whereas Star Lord is a really good character so my vote definitely goes to him.
Groot is amazing, but my vote is with Star-Lord! I love the characters storyline and trauma. The emotions he goes through (sad, happy, mad, jealous), are all portrayed amazingly by Chris Pratt, which is amazing!
