Ok here is the thing, with mainly Inf buys there is no way India is falling unit J5 at the earliest, and in all likely hood not until turn 6 or 7. On J1 they will buy whatever they buy, but more than likely no fighting boats. On J2 they will buy a major factory and little to no warships. On J3 they will buy ground units for Asia and once again, likely no fighting boats. On J4 they might start buying some navy.
That means the US gets 3 turns to play catchup in the pacific. Or with my main purchases 11 destroyers and 1 extra carrier. Giving them, on US 5, a fleet of 12 destroyers, 1 BB, 2 carriers, 1 cruiser, and 1 sub at Queensland. Wow imagine that, DEI is no longer safe, at all. Not to mention, on US3 we stole Java or Sumatra (fun thing to do depending on japan’s fleet positioning is to fly ANZAC figs to Sumatra after US takes it, but depends). This isn’t counting whatever ANZAC has purchased.
What turn does India typically fall in your games? What are you doing with India? What is happening in China? These are important details you are not telling us. And download Abattlemap, even if you don’t play with it it will show you the board.