I've played against Sebastianhu and he plays fair... So I dont understand your complains.
If you are a S&V player you are going to go everytime to the net and I think that If you go to the net 100 times in a match is ok that your opponent do 25 lobs for example. Sometimes is impossible win a point with a passing shots against S&V players so lob is the only way to win a point. But if the player knows how to play with a S&V player even lobs are useless.
Other think that bother to me is slow serves that S&V players usually do to have time to go to the net, I ever serve my first serve max power, and some players never do powered serves, and I read that zero powered serves are considered cheesy, so please, serves max power with the first serve or try to do.