We were in daycare too. There were times I sent her in panties and she came home in a diaper because she had an accident.

That is why holidays are a great time to work on it. You or spouse might have to take days off work. It sucks but sometimes life sucks.

Even if your teacher is rude, she isn't the bad guy. You are just having shit luck right now, and no amount of rudeness from anyone will make it their fault. It isn't about your teacher at all.

You could consider changing daycares but unless you are paying for the boughie premier ones you are unlikely to get a different response.

I paid for cheap daycare and got cheap results, they didn't help potty train and I didn't hold that against them.