However, they trend down especially when I spend a lot of time on social media or news sites, including HN.
To put it another way:
Emotional state without "the internet" = varying around a general background of contentment.
Emotional state with "the internet" = varying around a general background of discontentment.
This is unrelated to current political events, which I view as an overcorrection to the state of unhealthy and extreme political correctness that we were falling into a few years ago (wokeness).
Now the pendulum is swinging the other way, towards an unhealthy and extreme focus on race and social differences, glorifying in political incorrectness (anti-woke).
It'll swing back again in a few years. Just how far it will go before then is impossible to say, but it's not something I can control and therefore shouldn't affect whether I enjoy life, since I'm lucky enough to not be directly affected, for the most part.
But if I go on the internet for hours every day and focus on it, it surely will make me feel terrible!
On the other hand, I want to stay informed and connected. Some amount of discomfort is acceptable to accomplish that. The trick is mindful use of the internet, and I'm afraid I don't always succeed there, when I have a distraction machine in my pocket all the time.