I've finally found an Android TV remote that is easy to use - and it's free

When a remote that ships with a TV is just horribly designed, you can always turn to your phone to make your entertainment ...
Techno-Science.net

This Is the Only Bluetooth Remote App Your Need if You Have a Smart TV

Bluetooth Remote (or BT Remote) turns your phone into a true smart TV remote using Bluetooth HID, so no Wi-Fi or TV app is needed. It works like a keyboard and mouse, offers an air mouse and full ...