I currently have a 144hz 1080p monitor thats 24.5" and im going to upgrade to 240hz, is 27" a bad idea? Will the lower resolution at a bigger screen be a disadvantage?

So I just installed Valorant and while all the controls work (even ADS and attacking), I can't look around. Like no matter where I move my mouse I keep looking forward. I had to play the whole tutorial side walking and backwards walking. Th...