The help option is a good thing atm, looking at how easily some enemis can take you out of the fight. But i know your feeling. But realize that you are only knocked down helpless and die after 3 failed STs. It feels like a safety net because enemies do not have that option. This could be handled via difficulty settings i think,
going to only one saving throw to instant death on 0 HP. I hate difficulties that only power up enemies to knowhere...
On the adamantine golem, look up the beastary, those things ARE nigh unbeatable. Haveing to face one on such a low lvl should be impossible for a group like ours.
But this is larians game after all. They are using D&D 5e up to a point but changing stuff to make the game feel more like theirs. We have a lot of threads about those changes already since most of them break the balance of the ruleset. Happens when you decide to change something.