Specific challenges, random modes, and timed Boosts do not mesh at all

The basic format of multiplayer is all messed up. I may have 4 challenges up, but the random game can drop me in a mode where I can’t complete any of them, so I have to quit the match and find a completely different game because my boost is slowly ticking down. For instance, I had a melee, head shot, needler, and back smack challenge and ninja ffa starts. There is no way I can complete any of the challenges, which sucks because I like ninja, but I’m forced to leave so I can best utilize my xp boost. The random modes often makes it very difficult to get into the matches you need to to complete what you need in the challenges. Skipping modes you like and forced to play modes you don’t just so you can progress is a bad model. I’m normally pretty burned out from playing by the time the boost is up, because it’s such a frustrating way to play. Something has to go, either challenges or the random modes.