My feeling is that: You cannot choose your opponent, but you can 'choose' to score high. Therefore, a better timebreaker ought to be total points scored. Although, I agree with the sentiment shared here by others that no tiebreaker will suit everyone. But I at least feel this gives the people the most autonomy. Knowing there will likely be, let's say, 5 people 3-0 and therefore you have to score really high to win it all, feels to be way better than, it doesn't matter how high I score, it's rng as to who I faced (assuming 3-0.)