From a non US POV, under Obama people seemed disappointed and betrayed by how a man that they saw as on their side was not doing the right things in their eyes.

Under Trump it feels like those same people mostly gave up.

No. Nothing has fundamentally changed. That's merely partisan wishful dreaming, it makes people feel better to think their side isn't nearly so bad on eg privacy.

The machine that has been consistently moving these things along for 40-50 years now, transcends the parties. The parties have their marching orders, they largely obey. Politicians come and go. Feinstein for one example, if she gets replaced (which she will eventually, she's 84 years old), the anti-privacy pushers will find a replacement vessel.