Internet Crashing while TWO people play Valorant

So, while playing Valorant ALONE... Everything works fine but the second a second person in my home gets on to play with me, the internet just dies. I then have to reset the router to make it come back.

This only happens on Valorant, not any other games and I have already tried updating every driver possible on both computers, updating the router, reinstalling the game on both computers, and nothing is working.

If anyone has the slightest idea why specifically two people playing Valorant is causing this problem, becuase I am pretty sure its the router, that would be great!