I have no issue hitting stuff that is large in the game (humans, deathclaws and whatever else) , my problem is that since they downed the accuracy in VATs you either Iron Sight and snipe every swarm enemy with outmost precision and with lucky crits or you are dead as most weapons do not enough damage (yes, lasers do (for reference, i found a unique one), but have.. get this, no sights!).
Heck i am only bothering with the companion AI because alone vs cazadors i have seen about 60 reload screens already. I really hate those flies.
Still i don't hate the game mind you, i just let it lie around for 2 years and get the mods and play it properly then. There is just no point bothering with it until Arsenal, Lings, Calibr/xCalibr and MMM / FWE are converted to this (or equivalent mods).