Although I agree that most cabin crew are very young and immature, I have never found myself wound up by anything in flight, other than being told to close my blind so they can screen a stupid movie about bears playing baseball (with the sex bits cut out) while cruising over Greenland in broad daylight.
However, I suffer ground rage almost every time I fly to or from a big airport. Twenty minute check-in queue, pre-assigned seat reservation not in the system, then the guantlet of security / emigration, two mile walk / run to the gate, overcrowded departure "lounge" (gonna love those A380s, oh baby), delay, tailback in the jetbridge, idiots who have been allowed to bring a steamer trunk as handluggage and now they're blocking an aisle and endangering anyone sitting under them while they stuff it into a creaking overhead locker... I can't remember ever plonking my weary arse into an airline seat not drenched in seat. I love flying so for someone who doesn't, or maybe hate it, I don't know how they don't lose the plot.
Arriving can be worse - and I don't find LHR or LGW Arrivals that thrilling by the way, I am a non-EU national who is resident in the UK and that 'others' queue at T3 has NEVER been "five or ten minutes" (as someone suggested above), more like 30+, which admittedly still isn't as bad as in the US. Difference is that you're off the aircraft so you're more likely to kill a taxi driver than a trolley dolly / dragon with a wagon.
Agree with Mr Draper, ganga should be compulsory for SLF. No-one ever kicked in a shopwindow after smoking weed. The quickest and most stress-free inflight experience I ever had was Athens-BKK-Sydney on an Olympic 747 in my younger years. Swallowed a hefty lump of hash while on the taxiway at Hellenikon and dozed and snacked in contented silence all the way home. God bless those OA caterers for their generous portions. Although the view as we pounded out over the Greek Islands with the Med sparkling in the morning sunshine didn't really need any mood enhancement. (BTW I've flown OA longhaul without the Class Bs and still found them really good, including the food.)