My claim is that I'm the worst player to have extracted from Plat.
No. Noooo. No. Not even close. I suppose this is the right thread to go into detail.
Cue wavy lines, or possibly someone strumming in a harp...
The one word: hour
Some of my earliest, if not first, platinum extractions were during the final weekend challenge (lodestar). part of the challenge involved extracting against every enemy type on platinum, and as completing this earned you an extra N7 weapon upgrade I was very keen to complete it.
At this point even gold was relatively new to me. I could get through a pug gold with a TGI saber, and usually top the board unless someone else really knew what they were doing, but any other kit on gold and I'd be struggling, so platinum extractions were a tall order.
At the time Rio Reapers was pretty popular on platinum, and due to the challenge pretty much all you could find in pugs was rio with various preset enemies. I was lurking on BSN at the time, but wasn't brave enough to join the groups offering help completing the challenge and resolved to make do.
I couldn't quite bring myself to hide out in the box of shame for entire games, so I took the Ghost and lurked by the second ammo box in the small alcove in the crates. I could then spend the games picking off the mooks and phantoms, leaving the bigger stuff to gather round the box. If I went down I had to gel as no one was going to leave the box to help, but with stims, cloak and a healthy dose of craven cowardice I didn't go down too much, and the extractions against Geth, reapers and Cerberus went well, if slowly.
It all went to pieces against collectors. I doubt many people have tried the box of shame against collectors but it's a pretty bad idea. The praetorians are bad enough, but if a possessed abomination reached the box then there would be nothing left except a fine paste at the back of it. The pugs were quick to gel, and I tried to get back if I could although they'd inevitably be surrounded. But by the last waves they'd start bleeding out, and I had to clutch.
By some miracle we did the wave 10 objective and reached extraction. The pugs had enough sense to stay near the box rather than hold extraction, but sadly I got myself synced on the mad run for the LZ with seconds to spare. Partial extraction after over an hour of struggling, and I didn't get any closer to completing lodestar, but I had to laugh. I don't think any of us were even ready for gold, let alone platinum, so we were easily the worst players, and the worst team I've ever seen extract.
Tldr: box of shame vs collectors is painful.