It's true. Nobody reads each other's posts anymore. You might get supported by a few people that you know but that doesn't mean that they actually like your content.
Chances are good that they only uploved it because they like you or because you guya have a sort of good old boy thing going on. Nepotism. It kind of sucks and I do hope we can change the nature of steemit eventually.
It's obviously not 'nobody' as you can see here from the comments. Lots of people do read and engage. You just have to seek out the good people.
Those of us with some SP can use it to do some good. If you don't have time to flag or vote then delegate some to those who will. I don't mind losing curation rewards.