USC [don't mean the school]

[Dakota]

Was B3 out of the batter's box?

If no, then there is no interference (assuming B3 did nothing except make a bad swing).

If yes, the coach has a point, but the runner would have been sent back to 2B, wouldn't she?

However, F2 is still gone. Just because the batter is intefering doesn't give the catcher the right to push her down.