Plus from the clips you gathered you can very easily turn those into shorts. One particularly exciting match cut down into its best parts would make for easy shorts content.
I'd also work on the thumbnails of your videos more, to a person who's played a bunch of the game (which would be the audience of these types of videos) it simply looks like something they've seen countless times already, creating a more exciting and eye catching thumbnail would probably go a long way in getting more views.
And as for if you should keep going, YouTube is a grind, I can see you've been uploading for about 10 days. My recommendation is to not see it as a "Get big right away" and more of a "Experiment to see what works" and just enjoy creating :)