You don't really need to be good at games and there's no real sure fire technical/artistic/dialogue to it. Timing seems to be important, but often that's just playing the right game when interest in it is heightened. That's why so many Youtubers made a career from Minecraft, it was just something everyone wanted to see. That's waning now and many have been moving away from it, such as the Mindcrackers who most still do it, but some have stopped outright, almost all of them have been doing other games far more.
One guy, Quill18, is someone I found while looking for Banished gameplay around the time it was released. That game pushed Subs to him enough that <6 months later he was able to go Full time into Youtube.
Some people may actually like your videos, if they saw them. That's a big problem with so much competition. It's really hard to get noticed and find those people. I think playing the latest games is probably the best way to try and get some exposure. I suspect that a small channel would have difficulty Monetizing many of those games, I really don't know though, but even if you couldn't do that you could maybe grow your Subs.
That said, I think some people are just good fits with this type of thing and some people are not. Some people have limited shelf life, some are good under certain circumstances etc etc.
I know of the 20-30 Gaming channels I have subbed to over the years, some I really liked for awhile, then eventually unsubbed because I lost interest for various reasons. Even the ones I have stayed with I am inconsistent in watching them, they stop playing games I am interested in or their personality/persona just starts to annoy me. Even many very successful Youtubers are fully aware that their career is likely to be time limited.
I watched one of your vids for 10 minutes or so and thought I'd mention one thing: I don't think Face Cams really work for Youtube. There are some Youtubers who use it, but usually because their audience has requested it. Of the ones I watch a few of them occasionally use a webcam, one of them only because he uploads some of his Twitch Streams(where Face cams are more common and IMO natural). I usually find face cams on Youtube to be awkward though, they are distracting and unless the person is really naturally expressive in their face(even on Twitch) it makes it difficult to watch. Most people playing games usually have a blank stare that just detracts from what is happening. Like reading a book, it's usually better to let the viewer fill in the blanks and let the Game and player dialogue be the foundation the viewer builds upon.
I'm no expert, just some know it all on the Internets. So take with salt.