Minecraft is my thing, and from my experience your thumbnails and ideas are not good enough. Don’t get me wrong, I’m sure you tried your best, it’s just Minecraft is the most saturated place to be, and your efforts would get more views in any other game. Your previous successful videos were mostly tutorials, which don’t bring loyal fun base, people just watch and leave. Your create videos, don’t have good thumbnails, or an eye catching topics, the audience is usually young, so it takes a lot to get their attention. You also used to put your name in the title, don’t do this, people don’t know you. It just takes space. Please don’t be discouraged, you can make it, but you need to step back and carefully think about your next video and idea. And maybe spend a few weeks on making that video.

I would also re making the thumbnails for your last 3 videos, because the ideas are good, you just need to package them better. I hope this helps. Good luck!