Forced multiplayer constant lag still a problem? Really?

2 years… and every time i try to get into d4 i lag so badly i cant even play anytime im in a city or another player passes by. This is just ridiculous. Fix your game or let me play singleplayer… Judging by the track record so far, blizzard will never do either of these things. I deeply regret ever dropping a dime on this game.