In TS, earth post Judgement day was shown as normal as could be. Military bases still in use, humans living freely above ground, radio communication, submarines in use etc. Considering Skynet had been self aware for years the you would of thought there would of been a serious presence of robot's and humans would of forced underground like in the original glimpse's.
TS could of been a good standalone action film, but its poor in the Terminator franchise worse than T3 for me.
Skynet was also defended by one Terminator