I feel you, Pearl.
We had a successful Heretic Station up until we saw the poor off-host GE GPS did not hit the 50-shotgun kill medal. Despite him killing a boatload of stuff and us softening up some of the other enemies specifically for him to kill after we'd both gotten our medals already. Swear he probably came in at 49-shotgun kills or something stupid like that. Scratch that run.
Had a successful Pistol Pete until we saw someone missed the 50-pistol kill medal. All were sorta confused by that as we all thought we'd seen it pop up in-game. So, scratch that run.
Had a close Spiked Berserkers run. First and only attempt at it and rough as hell. One person got stuck on cover and synced Wave 1. I got synced on some other wave halfway through the match. Then on Wave 9 both my teammates got synced, leaving me with a Graal and heavy melee to try and finish off the wave budget. So much kiting, so much damage not happening to barriers on Phantoms or Banshees. By about the 20th lap around, I checked the time and saw it was already a 40+ minute match by that point. I was tired. Nobody else even wanted to play the game anymore because that match was so horribad. So, even though we'd hit all the requirements (somehow, miraculously, despite all of us eating pavement for significant portions of the match), we all agreed we didn't care anymore and I was just gonna missile everything and be done with it. And then, while trying to aim up to kill the Banshee and Phantom, I got sniped by a Geth Hunter with no more ops packs or medigel left.
I almost quit the entire game forever last night. Swear to God (okay, not really).
No video or screenshots of those, though. That film is all rage-deleted save for the snippet of Pistol Pete extraction I posted earlier where I showed myself getting the 50-pistol and 20-HS medals off the same kill with something ridiculous like 5 seconds left in the match. Because that's how I roll. Hair of dat chinny-chin-Turian-chin.