Suggestion...

I dont know what are the rules in other Asian countries but in the Philippines, we have this rule that if the last card you play is 2(any suit), it should be opponents remaining card(s) x 2 to make the "real" value of 2. Ive been playing your game for a while now but Ive noticed that my opponents are playing deuces like 3s, 4s, 5s...etc.

Ilokanosaranay about Big Two