Somtimes they enter to cover animation out in the open, They rush me and melee even tho they have pistols in their hands, And they use a fatman on me in POINT BLANK RANGE!
To answer your question as bluntly as possible: Yes. They're broken. The sad thing is it's likely on purpose. Probably to make the player feel more godlike since the enemies act like soldiers in an Arnold Schwarzenegger movie. (aka they always miss every shot while you, the hero, blasts all of them to Hell)
Huh?, ive always had them spamming infinite molotows, 100% accurate headshots halfway across the map, while i was in cover.
Same with bullets, but that was probably because i was playing on survival dificulty.
Even on survival difficulty I had enemies run towards me with knives while I was in power armor like dumbasses and enemies like ghouls run straight at me which means all I have to do is backpedal until they're dead. The AI hasn't improved at all from Skyrim.
It's likely reflective of the intelligence of the people who made Fallout 4 what it is today, and maybe also large parts of their fanbase. (Sorry not sorry)
BGS AI has always been broken, the enemies don't value their lives so will shoot a fatman indoors, or simply run at you with a switchblade while you're in PA. Another broken issue is the horrible NPC pathfinding, jump on anything elevated and you can finish them off while they walk around looking for a way up to your level.