So... for a movie that basically doesn't have any men in it at all, this movie kinda seems to hate women and especially hate them having any sort of agency? And it's super weird?
Like, OK, we have original Sarah Connor here who we're just torturing with like the cruelest possible existence. She already lived through the first two Terminator movies, which is pretty rough, and left her basically feral, tortured in an asylum for years, constantly on the run, etc. And then she watches her like 12 year old son get straight up shot in the back, and gets like choked out by an evil robot. Then she's told everything she's been fighting for for her entire adult life ultimately doesn't actually matter at all and affects nothing. Then she finally tracks down the robot who murdered her son, is forbidden from getting revenge which she just quietly accepts, and has to suffer the indignity of it joking around about how great raising a son is and offering her beers. PLUS she has this fourth wall breaky knowledge that she's in a remake of her own life to the point where she actually goes "Oh OK, so you're actually John" to Remake Sarah at one point. It's just awful and painful to watch. Both the actress and the character deserve way better.
Then we have Remake Sarah who... I mean just really isn't a character. We don't focus on her at all, we don't get any sort of backstory to her. She's introduced in kind of a comedy scene where she watches Remake Reese's time bubble appear while her I think nameless boyfriend is banging her, and berating her for suggesting they check if the random teleporting naked woman is OK after she steals his clothes (and actually I'm not even fully sure that wasn't just some other woman) and past that she just kinda... gets told what to do by what are eventually 3 different tough badass guardians. She has so little development that I can't even say whether sending her own future daughter back in time to save her own life feels deeply out of character, but... you know that's also a thing she is eventually revealed to be on board with and that makes her pretty unlikable!
Then we have Remake Reese there, who again, I do like, but I mean it's pretty purely for aesthetic reasons. She still has the same problem as original Reese of being this one-dimensional zealot just here to protect her parent-figure from robot murder, and while she gets to do some action movie stuff, she doesn't really get much in the way of development, does the whole noble sacrifice thing, and spends an AWFULLY large amount of the movie all things considered being passed out/incapacitated/needing to be brought a bunch of drugs. And you know, ultimately has to team up with two other guardians to do her job, not even getting the final big heroic sacrifice of the finale. So, that sucks.
And then we've got the 4th (or 5th?) woman of note here, joke-Robot-Arnold's human wife. Who we are specifically calling out as being too stupid/oblivious/unconcerned to pick up on the fact that she's been married to a killer robot who does not eat or sleep for something like 20 years "because he's good at cleaning diapers," and who... agrees to just kinda walk out of the movie, and her home, and her marriage, without so much as a word of dialog, after being briefly introduced just for the sake of a ridiculous joke.
And like, that would be bad enough, especially for a movie that's specifically trying to cash in so hard on Badass T2 Sarah Connor, but this is as an immediate followup to Terminator: Genisys, the movie that was mainly about calling its own predecessors out for having this pretty gross plot where some future jerk sets up this weird manipulative time travel plot to get his friend laid by his mom in the past, make sure he's born, and gets to be future war Jesus, by both directly observing how that's messed up, and further altering the past so she just gets to be the big world saving badass herself and do a way better job of it to boot. And I mean yeah it kinda mucked things up enough to make a sequel practically impossible to do, but it's also the one movie in the franchise that was at least kind enough to actually leave a sequel hook open they could have used.