Would I have a chance of gaining popularity on YouTube by making content specific to Valorant's Esports scene? This includes VCT, Challengers, Ascension, etc.
Then do it for 3 months and quit if you haven't grown? I think 3 months is a fairly unrealistic timeline to gain traction on any media platform, but if that's your worry, just do it and if you don't see results, don't do it anymore. Although I think if you really enjoy making that type of content, you should keep making it as long as you enjoy it.
you will never know if you never do it. Just try a different approach rather than full on analytical or breakdown stuff because there's already plenty of that and with all due respect to you i find it difficult that you can do it better than people like Sliggy or Platoon, so just do your own thing and theres always a chance