Which Fleet Managers?
The CP allegedly resigned because the O2 thief 2 levels above bollocked him in front of subordinates, a cultural no-no.
Near crashes on a monthly basis - BS.
subtle changes in environmental conditions - yup, subtle being the one that sneaks up on you when you're tired and/or not expecting it!
floating after encountering performance increasing updraft - laws of physics dude, what were you expecting. Unless you have superhuman powers to predict it, you have to react to a change. May not be a native english speaker so "found" might not be the most enlightening phrase.
There's plenty to complain about, for sure, but there's a heap of hot air here too.