Pro Tip: if you click on the "magnifying glass" icon on this website you can search forum posts. If you do this and enter "Hyperion" you will find a lots of posts and threads. eg this one Hyperion addon does not work with inputstream.adaptive (Netflix etc.) with Pi4
Disabling hyperion works like disabling any other addon. Go to Addons->My Addons->All Addons->Hyperion and click on "Disable".
And is the rpi4 2gb enough for 4k or must be 4gb?