I’ve played a lot of GregTech during last few years. I play on hardcore since I want to learn from my mistakes, YOLO style.
It frustrates me when I stupidly die to mobs, throw wrong stuff into crucibles, walk near lava, click on a NEI recipe and die to mobs during 3000-recipe load or tweak the electolyzer in the rain and then have to restart my world due to them. That sucks, but these were all my fault and I should’ve prepared better.
But then there are stuff that’s just outright unfair. In vanilla, entering the end is one instance where you could get really unlucky and get knocked off by the dragon instantly and even ender pearl couldn’t always save you. But for GregTech there are a couple extra such mechanics added. I died to russian FSB skeletons with polonium darts because I didn’t have cure-all a couple of times. Finding cure-alls requires quite a bit of luck. Fortunately I could banish FSB seketons from config. Radaways probably would’ve helped too, but they’re far in the techtree.
Now most recent game ended by what I guess was toxic gas. I found some oil (after getting damaged by it after finding it, fortunately I was in ok health). I mined through a slightly different route, saw something entering my tunnels, tried to escape the tunnels but was killed in a couple of seconds. It’s like hyper version of nether lava that you can’t defend yourself against if you unleash it. I guess I have to rush rubber and get a hazmat suit for mining now, but mining only with hazard suit sounds very not fun. It would take close to 10 hours for me to get that, and I would have to prioritize it.
Both of these are terrible that you can’t really prevent them from happening, only try to fix it when it happens. Late in the game, with tech you can get a few more tools against them, but you just have to rely on luck in the early game.