In my case, I don't feel it's the Internet in general. I think it's Facebook that puts me in a funk. Oh, and I steer away from Reddit, if not feeling great. That said, I think I'm a lot older than most you you guys. I'll honesty give the reasons why I find FB depressing:
I don't have a lot of friends. I find people so self-aware on FB, I don't find them interesting. People, I used to find interesting, edgy, true individuals seemed to turn into just boring, conformists. Nothing wrong with boring, and conformity? I think it just all reminds me of my own mortality?
I also learned--I'm not the person I thought I was when on FB. Meaning--I'm more critical when I'm on that site, than in real life. Example--I go to someone's site I used to know, and see the physical age in their pictures, and it's just depressing. I see how some have given into being their parents, and it's just depressing. I see the see the car I was suspose to inherit being trashed by my nephew, I get depressed on a lot of levels. I also see that people aren't breaking down my doors looking for me--as a friend, I get depressed. I look at the news feed, and what FB thinks I'm interested in, I get depressed. I see that that the one person I thought would not have over 1000 friends, is actively trying to friend my pseudonym profile, I get depressed. She doesn't even know the most depressed civil war soldier's name, and she wants to friend him. (In the civil war, a soldier was showing signs of melancholy. A doctor decided to call his condition depression. I use that soldier's name on a FB account.)
I see my pictures have been stolen, and I get depressed. I see my stolen pictures, with a new copyright, and I get depressed. I always deactivate my account when leaving FB.
When FB, monkeys around with the deactivation process, I get depressed.
So FB does make me depressed some days. Maybe, it's just too much reality? Are we suspose to know exactly what almost everyone is doing, or not doing? What age has done? What lack of opportunities/money did to some peoples lives?
I don't hate FB, but think it needs some real competition. Right now, it's just too big. Its tentacles are integrated in too many websites. It's become its own internet? It's just to much posing, trout mouth, Kardashian, narcissism for some days. Today is that day for me.