Class Challenges

can someone explain to me why the class challenges in this game are so horrible? most of them are unbelievably stupid or selfish, especially the smoke assists… That mechanic must be bugged because it doesn’t work at all and most people run away because they can’t see anything. And to make it worse I only have redsec and have been trying to do it on Gauntlet and it is an absolute nightmare. Who designed these challenges??