1+0 bullet game gave me 3 minutes

My time at the beginning of the game kept going up until it reached 3:13 on move 2, while the opponent's clock stayed at 1:00.

That's because your opponent hit the "+15 seconds" button multiple times.

You can disable this in the settings.

your opponent was too nice to give you 3 mins

Ah okay, thank you, I completely missed that.