Using redfin to view but not buy while you have a realtor is stupid. If your realtor doesn’t want to show you a property, find another realtor. If a realtor is trying to sell you a property, move on.
Heck, my realtor gets me to not buy the property because he points out the faults so I don’t get suckered (I am looking in the lower end). Find yourself a good realtor and you don’t have the problems you are referring to.
Just don’t waste someone’s time that you will never purchase a house from. While many do not have high opinons of realtors (I admit, I fall into that category for 90% of them, but they are still human and are trying to make a living)