For me it feels like graveyard when I search for a hashtag that interest me and all I see are promotions and links to other pages. I want to see actual discussions among people like me so I can participate.

Note: I don't truly understand how to use Twitter...

Can feel like it goes hours with barely anyone seeding it with content, outside a select few people. You can tweet something you feel is really interesting and get no feeling that anyone has seen or appreciated it (my two main accounts have about 800-2000 followers). There are some active topics, but a lot of friends have abandoned it for Instagram. I don't use Facebook so I don't see how active that is by comparison.

My wife works in social media specifically and would go days without a tweet now. I take that as one sign.