My unwanted opinion. 😄 Terminator 3 isn't too bad and I give most of it's credit for the clever switch and bleak ending.
I watched Terminator: Salvation a few weeks ago and it's not bad at all. The grubby Mad Max look works quite well for that universe and I also enjoyed the new designs of Terminators.
Sigh. Genisys is just a mess. The faithful recreation of the opening of the original film is the only thing going for it. Either I missed it or a major plot point is never explained (possibly left for the unmade sequels), all the hype about Matt Smith appearing in it was rather pointless and the marketing department decided to use the biggest surprise plot point in all the trailers. Oh, and Jai Courtney is a terrible Kyle.
If I had to be kind, I'd say Genisys is a solid action movie but a bad terminator film.
I'm going to watch Dark Fate again this week, I haven't watched that since it's opening, see how I feel about the last entry to the franchise.