Are you comfortable backing up and restoring your data? Reverting will result in a complete wipe of the device
Are you comfortable rooting a phone? You'll need to root in order to prevent the update happening again
Are you comfortable knowing you'll never receive another security patch, even for a major vulnerability? Samsung will no longer patch Oreo for that device.
Are you comfortable with the risk that the device could be unusable if something goes wrong in the process?
ONLY if you said "YES" to every one of those questions - here's a guide to using Odin to restore a Samsung OS -
https://forums.androidcentral.com/a...tock-rom-via-odin-new-interface-new-post.html
What are your issues with it? Maybe something a theme will help with? Flashing an old OS is the "nuclear" option..
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