So I had a look at your content, you voice levels are ok you come across rather clear, and I never struggle to hear you over the gameplay which is always good. As for your content once you watch click it, your gameplay does catch my attention however the one thing you should really look to improve on in my opinion is your thumbnails. Try and make them more personal to the games you are playing rather than just a bland generic frame from the game.
Also as a side note I can see that you hadn't arranged any of your videos in a playlist on your channel. I would recommend you do this as it helps your viewers just watch certain content without having to scroll through all your videos to find certain things.