That sounds like a pretty crappy creche honestly. Then again, it could have just been one bad day, and your own reservations about it all making it seem so much worse?
There are supposed to be regulations about the number of kids they can have per carer, particularly those under 1yr.

My kids used to go to the creche at the gym, but it was a fabulous one. 2 of my kids have always loved it. One of them (my ds1) always hated it. Would scream and carry on the whole time. It was very distressful for him, yet he has always been confident and outgoing while I'm present. I ended up having to stop taking him for six months. We tried again after that and he was much better, although he would often spend the whole hour at the window keeping an eye on me. The thing it taught me though, was if your child doesn't like it, don't push the issue if you can - give it a bit of time and try again later.