I feel your pain and have been there. It really starts to feel like “why am I putting myself through this” and every day grinding gets real old real quick. Right now you got 66 tracks in your library, so keep pushing and as long as you’ve got the creative juices flowing make good music. On the other hand if the grind has put you in a block then focus on marketing and promoting the music you do have. Just switch gears for a little bit and see if that stimulates some sales and gets you feeling better.
There is no reason to just add some music here and then let the search engine drive traffic, you can control some of that and drive your own traffic to your tracks. Here is the truth, there is no one that cares more about your own success then you. So fight for it, drive some traffic, market your music, and hopefully something will break loose. This is a weird business because it’s bipolar in a lot of ways. Sometimes you are rocking sales, sometimes you can’t catch a break. Either way, you could wake up tomorrow and something could have happened that totally changes your life. Music is funny like that, you just never know.
I think everyone has felt the way your feeling at some point or another, you just have to push through it and try to figure out a new game plan going forward. This business is constantly changing which means you have to keep changing as well. Hope that helps, and good luck!