^I'm in agreement with most of what Saitsu says here, especially with FGs having multiple releases of virtually the same game too soon. I also wish that more could be done for XIII netcode wise to please everyone. The most we could hope for though is them strengthening it somehow, and there's no telling if that's even likely.
Not to downplay your situation Eripio, and I'm sure you've tried this already, but I'd say keep trying to get people interested in it if you can. I think it'll have enough staying power to last until the next SNKP game, whenever that is. If others around you play fighters, KOF is definitely a possibility. From experience, sometimes it just takes someone to knows how to play to show others why they should be playing too.
I don't know if this will help your situation any, but between getting the online player listing together, and the DC online tournaments in the works, maybe you can find one or a few people you can have a decent connection with.