My dad is extremely irritated with Android TVs as a concept. He just wants to watch something and complains about it taking a few minutes on startup to even show the screen where can can select YouTube.
He does not understand that it is just like a phone. Unless you keep it on standby (which he does not want to do: wastes power), it will boot, slowly, till all the subsystems are up and running. The low powered processors, the low speed ssds, and minimal RAM makes everything worse.