How do I resolve the issue of my Smart TV displaying distorted or stretched images?

Check resolution settings
Verify the resolution settings of your TV are set to the native resolution of the device.
Check for firmware updates
Refer to the manufacturer’s documentations and see if there are any firmware updates that need installation.
Check your HDMI Cable or other signal cable
Check the cable connections at both ends and examine the cable for bends,kinks,or breaks.
Check the source devices resolution settings
Verify the resolution settings of the device that you are using to send the signal to the TV.