YouTube is a funny place. I'll be at 5 months in 2 weeks from now and am just shy of 200 subs. Most of my videos average around 50-100 views, although I do have two that are over 3k, and another over 2k.
Then you see YouTubers that hit 20,000 in 6 months. Usually they are already famous or have famous people in their videos or intros. It can be discouraging as making good content is time consuming, and their is no financial reward until you get to that magic 4k watch hours and 1k subs. Even then, I'm sure the monthly pay is very minimal.
To answer your question, your subs for 1.5 years time do seem slightly low, but like I said every channel is different. Most gaming channels seem to do pretty well, and are popular. Have you considering trying to Collab with other similar channels? With gaming it seems like it would be easier to do remotely than most other content. So your not limited to local people.