Hi @Gaybinator
as i've posted ages ago in this threat there is a solution, but you need to use the adb shell:
pm disable-user --user 0 com.samsung.android.app.sharelive
... and ShareLive will be gone. It stays gone even after major OS upgrades, at least it did for me the last years.
There are numerous guides about how to be able to use that adb shell that are originally needed for development on android, hence its name "android debug bridge". You do not need anything shady for that, just some very common development tools.
This could be one of the (numerous) guides out there: https://r2.community.samsung.com/t5/Others/How-to-set-up-ADB/td-p/10461546 I selected this because it was posted on a samsung community page as well.
The official reference can be found here: https://developer.android.com/tools/adb
If you do not want to do this (like the threat creator @Adi0 ) you probably do not suffer enough from this feature. I would welcome a clicky-GUI-soluton by Samsung, too - but this won't happen as long as a major regulator (usually the EU) won't forbid them not to. If you want such a solution maybe start lobbying.
Another option would be to ask someone more familiar with computers to help you out on this.
