I watched two of your videos, the one on mafia 3 and a film review.
The mafia one was good, if I was to critique it then I'd say get a better mic, and record and render in 1080p60fps.
With regards to the film reviews, in my honest opinion I think that they're pointless.
At the end of the day a movie is nothing like a game. You'll watch good and bad movies and most people will judge a film by the trailer.
It's not that he doesn't present the review well, it's just nobody will be searching for a particular film review. So you won't get many clicks.
Also, due to the quantity of videos and your quantity of subs I'd suggest that your either incorrectly tagging your videos, or YouTube isn't recommending your videos to others because in the past people have viewed it and not commented/shared/subscribed to you.
What I would do if I was you, is when you next produce a really good video in your opinion, or use a popular upload of yours and share it as much as you can. I'm talking multiple forums, FB, twitter etc.. due to the quantity of content people will visit your channel and have a lot to watch.
I hope this helps as I know it's not easy.
Peace