Most koreans problem with playing with someone out their region is usually down to lag or poor connection. So they refuse to play with anyone not from korea for example it's why they kick most people when they enter rooms even if you are a high level or "pro".
But in all honesty, i like to just find a high level room and just sit and leech because there is no way that i'm going to spend my life grinding, being bored to try get #1 ha. Plus imo i find it quicker most times when people don't help but guess that's just down to the people you play with.