You can't fix Triple Triad. The core design of that game is flawed.

The person with the better deck wins. Or at least can force a draw. There is basically no way to win a game with a weaker deck except the other person makes a mistake. At the core the game is quite similar to Tic Tac Toe, which you also can't win when both players know what they are doing.

They added these RNG rules like swap and chaos to mix things up a bit but it's not working out.

The only thing which makes Triple Triad fair and grants skill expression is the plus rule. But plus is math. And nobody likes to do math.

And the combo is just bad designed. You can already take more than one card with plus, the combo is just overkill.