Yes it was intentional. Remember this movie is cramming a 4 or 5 volume comic story into a single film.
The comic expands more on it but Scotts main theme of his character arc was about him growing up and being a man. He starts out as a swarmy manchild living on his homo friend's floor, getting kicked out every time he wanted to get bussy. Dated his friend, cheated then dumped her and acts like she became a bytch for no reason. Gassing up an underage expat girl because he got nothing else going on and bushes her at the first sight of new p*ssy.
Scott was a fukking a$$hole, but like most new age whiners he rationalized it with his depression from a bad family situation back home and getting his heart broken by Envy. Up until the beginning of the story it has yet to dawn on him that many of his friends care for him but everyone is disappointed in the shell of a man he's become. They tolerate him and his excuses but he starts noticing how life is starting to move on without him while constantly escaping to video games, the band and comics
Over the course of the story he starts out meeting Ramona, falling in love with her without resolving anything, mainly his insecurity. While he's fighting the exes these things cascade on him and he realizes he's not on her level
Scott half assedly tries to resolve these and the effort makes him a better man for it. (Gaining the power of love) he gets a job, his own crib etc but he's doing it all for romona. he still blows it and ramona betrays him (due to her own insecurity character arc) and goes back to her ex.
Afterward he finally sees the folly of self pity and starts handling his BI like a man. Broke up with knives forreal and gave her dad the hands. Apologized to his ex. Bushed Envy. Got a job he cared about. Beat the last of ramona's exes just to finish what he started regardless of how she feels. (Gains the power of self respect)
After I read the comic I knew the movie would be bad with how much they had to cram in. It was surprisingly cult popular due to the video game aesthetics but damn it aged badly.