It actually saddens me to confess this, given T2 is my favourite action movie ever, but it just hasn't aged well at all.
I watch it now almost as if it is a period film, which Cameron intentionally stylised into kitschy retro monstrosity regarding production design, performances and even action and effects.
T2 is meant to be set in 1995 fgs, but it doesn't even resemble 1991 (the year it was released). From the outfits to the technology featured in the film, it screams 1980s.
In complete contrast, T1 actually looks good, T3 comes across as timeless (as in it can be set anywhere between late 90s and 2000s), and T4 is pretty good at setting up the future world convincingly.