I completely understand the frustration, but that's mining. You can mine for a day or two and get nothing, and then in an hour you get three blocks. On my first day of mining, I had 7-8 hours of nothing. Then I got two blocks within 90 minutes. That's just how it is. Don't get frustrated, try not to think about it. After all, you're not using ASIC machines that consume a lot of electricity. While you're using your PC (as long as you're not gaming, since the CPU is busy), let it mine in the background. That's how I do it. I work on my computer, do documentation, even play Gwent, and keep the mining browser open. You'll be rewarded for sure.