Louis Green?

i’ve recently been rewatching the original series to prep for new blood and original sin. and i know there is already some discourse surrounding this character but i wanted to touch on it to hear other people’s opinions. i am SO confused by this character and his motivation. i could not understand why he was messing with dexter in the first place? when i googled it the only thing that came up was that he was mad dexter crapped on his game so hard (grow up first of all) but that doesn’t make sense? louis had already bought the ice truck killer hand online before he even worked at the station. so why was he messing with him in the first place? and if i’m remembering correctly i think he sent him the hand before he showed him his game. idk if i just missed something watching this but it’s been really bugging me