Toddler might be kicked out of 1hr daycare

I dropped my 2yr old off for a 1hr preschool type of thing and they had to talk to me afterwards about her behavior because it was so bad. She was hitting, pinching, biting, pulling hair etc.

This has been going on for what feels like an eternity but especially ramped up after baby #2 came 6 months ago.

I’m feeling like a complete failure and an at a loss for what to do/try. I feel like we’ve tried everything and have stayed consistent if we try a new method.

Any suggestions, words of advice, words of encouragement would be greatly appreciated. Feeling very isolated right now.. 😔