I don't think the medics reactions are realistic.
Surely if you've never seen this before you'd immediately try to get out to radio in there's some alien creature slaughtering everyone? Not spend time looking at a baseball.
The hybrids, to be honest I just find them irritating. I guess that's just a personal view. I don't like the acting, I don't like they are sort of scared, follow orders, but are really physically strong. I'm not sure why they aren't totally subservient or randomly rebellious. It just sits with me as plot armour I guess.
They act like they are immortal. But also not. They all went in to a scary/dangerous situation. No one said no.
Fine if they have no fear. But they also show fear. It just doesn't line up for me.
I do think the aliens behaviour is inconsistent. Sometimes it will not be able to catch someone wandering down a corridor. Other times it can wipe out 10 people in a second. It's not a big deal this one. Just find it a bit "making a show for the camera".
I had a look through some reviews from ordinary people and the gripes line up for most people who didn't like it. As in what I have written is basically same as for others.
Mostly people compliment the Sfx, the look and feel of Weyland kit.
Most people don't like the adilt/kid acting and the lack of perceived terror from anyone.
I guess it's just one of those polarising TV shows.
It's been a couple of weeks since I watched it, but wasn't that just after he'd been swatted around by it? A situation that'll likely leave you disorientated/mildly out of it for a few seconds at least until your brain recovers a bit from what has just happened.
You see it an awful lot after car crashes and other events that either cause the brain some short term trauma or put you in a bit of shock, people don't instantly recover/get up and react "rationally" and whilst your brain is effectively doing a soft reset you can end up focusing on trivial things that bring back a memory or are "normal", especially if there is something to trigger that directly in front of you.
It's far more realistic than him instantly jumping back up, grabbing a gun and going full Terminator.
Even the alien's behaviour is fairly consistent with the previous films (including the first two), and the books, they kill the immediate threat, they'll try and kill food/incapacitate incubators quickly if they can but are also smart enough to be wary, especially if they are the only alien.
IIRC in the canon it's basically the Alien as a lone unit will tend to be a stealth hunter unless it's forced not to be (collecting resources is it's prime objective at that point), until it's either laid it's one egg or there is at least one other, and part of that "stealth" is not leaving witnesses behind if it can avoid it, so it's in a room with a bunch of unarmed people, it's probably going to try and kill them all as it's been seen and they're now aware if it and the threat.
It's basically aware enough of it's situation that it tries to maximise the return for it's risk now and in the near future.
Hence in the films sometimes the aliens even as a group will try to pick people off one at a time without suffering any losses, and sometimes they'll go in willing to suffer a lot of losses to eliminate a threat or gather a large amount of resources (food/hosts).
I quite liked how the portrayed the reactions of various people, they varied and almost all of them had some basis in the background of the character and circumstances so they varied both between characters and situations.