What a totally empty movie, a shell of what came before it, and not much better than the entries after 2.
Seeing Linda Hamilton be a grouchy, no-fucks-given action star was good, but nowhere near captivating or versatile enough to carry the over 2 hour runtime.
Mackenzie was decent, but spent most of her screentime either overheating or rolling on the floor in pain. This is the augmented super soldier you send back to protect your only hope? Wish they'd given her more time to be badass and cemented herself as a force to be reckoned with.
Arnie was great and was kinda used as Tim's comic relief stand-in. There is some decent one liners and Arnies delivery fits this perfectly. I enjoyed the spin on his character and what he has become, even if it wasn't fully realised outside of some emotional baggage to give the ending added weight.
Everything else is just popcorn fodder. Loud, sometimes slick, sometimes cumbersome action scenes that feel mashed together with very little coherency or requirement. Nothing stands out as a defining moment or that the movie is finally hitting its stride. It just feels like a bunch of individual scenes inspired by the original movies but without any of the innovation or polish. Like going to see your favourite band and finding out you got a tribute act. Sure, they can play the songs, but it lacks any of the original authenticity.
The story retreads the same ground its prequels walked much, much better; do yourself a favour and just rewatch T1 and T2.