I don't need ads playing on my second monitor that I already have no desire to see. At least make it an option rather than launch EVERY TIME. Also take in account most gamers have monitoring software that doesn't rely on ads to be free to use. 0/10, Horrible idea.
Sorry to hear that, you can disable the Game dashboard from the game settings, so it won't open.
More info here https://support.overwolf.com/en/support/solutions/articles/9000208995-how-to-record-on-outplayed/#What-is-the-Game-dashboard-(Secondary-screen)?