C.M.
I know its hard to hear that, but I don't think it was so much your child as it may have been her. In all probability she wasn't providing much activity and kids get tired of access to toys pretty fast. Not that they need to be entertained 24/7, but they do need some engaging activities.
I personally think your son would do much better in a center or a certified home daycare. They will be better at keeping him busy so he can adjust more easily. They will also be a bit better trained at dealing with children's schedules conflicting with others so feedings, teething etc won't be an issue. A center is also NOT going to tell you your child is too much unless your child is violent and inflicting harm on another child. They may say your child had a bit of a tough time during parts of the day, but they'll also make sure you get positive updates too.
Good luck!