BAD SERVICE MC DONALDS AVONWOOD!!!

i had the worst experience ever the cashier at mc donalds avonwood has the most nauseating attitude ever and this makes me think is that how we handle our customers ?correct me if im wrong should we not give the customer a experience to remember?whether it is a retail store or a fast food restaurant this took place on 27.03.2018. anyone else experienced this?Upside to all this is that the manager is very friendly and cool headed she told us that the situation will be addressed we should have more managers like her running the place.