How much is too much to pay for services at your dealership?

I recently got my 2017 Mazda 3 GS serviced at Buds Mazda Oakville Canada. I was charged $280 for the labor (receipt attached) alone while parts was just $55.

I can see that all this labor cost was for engine oil change and the rest was mostly just inspection for the 72k service. I even declined tire rotation since I had recently installed winter tires on my own.

My car is not under warrany anymore and I feel like dealerships charge an exorbitant price for these regular maintenances. Am I paying too much and should I move off the dealership for servicing? What do I risk with leaving the dealership?

Also, for Candian folks out there, any recommendations for a good place to service my Mazda 3 in the Halton / Hamilton region?