Server lag issues in Savage have absolutely made me angry in the past. I'm okay dying due to personal mistakes, but it's always aggravating when server tick ends up killing me even when I do the mechanic correctly.
Beyond that only time I get angry is when I have someone who joins a farm party and then expects to be hard carried through it. If you aren't too hot on the DPS fine, I can make up for that even if I'll grit my teeth. However don't kick up a stink when you're constantly dying and killing other people. The last time I got that angry was back when Titania EX was new and we had a monk that basically expected us to drag him through the fight kicking and screaming. I have no idea how he beat it before joining our party but I weep for whatever group he inflicted himself upon before us.