While the Guilty Gear tutorial stuff is really good, I think the 'problem' there is that there's still just so much to learn.
Honestly I think it's also a problem of expectations, i.e. even with the best tutorials in the world, you still can't expect to actually become good without putting in a lot of time. That said it's actualy not as hard to jump in and have a good time at a lower level than people assume.
That is the biggest issue with fighting games vs other popular genres. Even if they do a good job teaching the mechanics and combos, most people still won't be able to pull them off. Online play only highlights this issue. It is similar to FIFA with the dribble right stick controls. You can empower the player up to a certain extent but most people will end up spamming one simple move because it works well enough.