its not really an insult...people need to calm down. This game was made to have fun. Even at high levels of play, people are STILL having fun. Sure this guy is OBVIOUSLY using n00b tactics, but for all you know he could just be spamming it up and getting a good laugh for kicks. What did you expect in "with anyone" play anyway? Its with anyone? And that means anyone from a complete n00b to a a really good player could be in there. Really good players are rare because of two reasons. One, Wifi sucks, period. Lag is not the way to show whos better. If you think there's no lag you are almost always wrong. Try pressing A and see if your character reacts instantly. If they don't that's called button lag. Second, most people SUCK on with anyone. They are 5-13 year old kids who play with tons of item for FUN. If you want a serious match use the friend finder and quit whining.
The only insult to me while playing is when someone loses repeatedly, and decided to choose the same character I am and then SPAM the same move. I.E. I choose Pit and they spam Angel ring. I can beat them, but thats not fun. That's just annoying and disrespectful because they are mocking my character and trying to indirectly say "you're character only wins cuz this move...watch I'll beat you just by using this"
THAT is an insult. But besides that, skill level is not an insult. Cut them some slack, I'm sure you weren't that great when you started. Sure, most people aren't ******** enough to not know how to get their third jump, but have some respect that some people vary in skill and take time to get better. Also respect that there ARE casuals out there. People who legitimately enjoy the game for fun and party purposes. Smash isn't just a competitive scene. Its a great game to play with your friends casually. Me and my buds play more smash with items on and on crappy stages then I spend trying to go to tournaments. Its just a game. If you are tired of playing crappy people....then find good people. don't whine about it.