If you're that desperate, and nobody is willing to, all you really have to do is go to Youtube and find recent videos of Pit if there are anyway. (Videos from as early as March-July will NOT SUFFICE! The latest you would probably want to work with is about August by this point.) Watch what the Pit players do, see what mistakes they make, what they do to beat the opponent, what they did wrong that costed them the match, you know...I hope...
And if you do actually get a challenge, the thing is not to play against Pit, but you play him yourself. How can you possibly get better as a character if you don't play them on the Battlefield? If anything get somebody who knows enough about Pit to Brawl you, and then ask them what you were doing that they felt they could easily capitalize on.
That's just two exampels of what to do, there are so many ways to improve that it would take me forever to list them all. You have options, work with them. That's most likely what the pros do to get to where they are now.