The Terminator movies have been mostly meh or terrible, starting with the third one. "Dark Fate" made a pretty good earnest effort that was the best of the bunch. "Salvation" tried to be a more focused character study and I give it points for its ambitions.
Movies in general feel pretty doomed to me. Studios are too scared to do anything too original and so just do endless sequels and reboots.
That being said, the Predator franchise has been the worst of all of them, yet "Prey" managed to be pretty great.