Am I unreasonable?

Long story, so please bear with me.

I go to my ex's house six days a week to look after my daughter while my ex goes to work and five days a week I take my daughter to school and I take her home at the end of the school day.

My ex has been seeing this new man after work which is Ok but on Friday just gone, I had to go out of town so I asked my ex to be available to get the little one from school. Instead, she decided to go her boyfriend's house and if I hadn't phoned his phone (she left her phone behind so she wouldn't be disturbed when with him) then she would not have got back in time to get the little one.

I said that I'm disgusted with her for putting this man before our daughter - the man has severe mental health issues so I said I don't want him near my daughter too. She says I'm just jealous.

Am I unreasonable in asking her to put her daughter before her new boyfriend?
Am I unreasonable?
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