3 is goofy for sure but the lady Terminator did a pretty cool job and the film has some of the best action scenes in the entire series. The last two have absolutely nothing to offer IMO.
T3 has most of the same issues Genesys and DF have though. All 3 are rehashes of the same story and villain. All 3 negate the ending of T2 (well Genesys less so since it happens in an alternate timeline). 2 of them have horrible humor (although "RELAX" was funny ). 2 of them had main characters that had very poor chemistry together. One of them had a goofy a-bomb powercell (such a horrible weakness to a Terminator to introduce).