I haven't had a lot of time to watch Dark Fate yet, about halfway through, just after they leave with Carl, and while it's certainly not on the level of T1 or T2, so far it feels like one of the best entries since those, I'd easily put it over the others for overall movie, though Genisys is my favorite post-T2 Arnold outing so far.
It does seem like some folks have hope/expectation that the Arnie/Linda/Cameron trio could turn something out just like they did 30 years ago regardless of aging, that was never going to happen, all you could ever hope for was better sequels than the previous attempts.