daughter is having a hard time with daycare

got my daughter into daycare when she turned 2 in October and since then has gotten better with napping there (or so i thought). We got pulled to the side today during pickup and was told she was hitting and scratching the teachers & screaming keeping the other kids awake. i feel terrible and feel like most of it is my fault since she isn’t sleep trained all the way and i suppose just need some advice? i feel like she’s going through a sleep regression as well because even at home she’s been fighting bed time tooth and nail.