Enough of this nonsense! You're a stupid game; all you care about is money

VSA is pretty much played locally vs the equivalent of your opponent's line-up, then the scores get compared. If you get lag and FPS stuttering in VSA, it's almost guaranteed that your device is the source of the problem, not discounting other factors, but if a locally played game lags and frames drop out, you can hardly blame it on the servers.
What's your device? What troubleshooting have you done? etc.