How do I force a reboot on Switch to play Rocket League?
This is a good option to try if the console freezes, or won't respond:
Remove the console from the dock
Attach the Joy-Con controllers
Hold down the Power Button for at least 12 seconds to force the console to power off
While the console is powered off, remove any game cards or microSD cards
Power on the console
Perform a system update
Start Rocket League