I legit drive around with my left hand shielding my sideview mirror Window tint helps enormously with this. When I drive other people's cars without any side

I legit drive around with my left hand shielding my sideview mirror Window tint helps enormously with this. When I drive other people's cars without any side window tint, it's unbearable. There are also dimming side mirrors that can be retrofitted, but obviously that depends on how much aftermarket support there is for your vehicle.