I don't think you're alone.
I have no problem running @kszac's img.tg builds on s905's, but I've never been able to get Demetris img.gz builds to run on s802 hardware (tested only on round S82 boxes aka Orbsmart).
In fact, I can get OpenELEC running on the S82 boxes I have, but any time I install Demetris S82 builds for the same hardware, it just boot loops.
Speaking of which, it may be easier for you to start / try the "kerber" builds of OpenELEC and get everything working, before you try these LibreELEC builds. I know that might sound like a waste of time, but for some reason, those builds always work without a problem for me, and it will help you get a feel for what should be happening, and if it's actually something you're doing wrong ...or... truly a problem with compatibility.
This is the link to those builds for testing:
MEGA
Depending on your box, you won't necessarily have an option for a 7.0.2 OpenELEC build, you may have to go back to 6.0.0, which is fine, because this is for diagnostic and learning purposes both, you can always upgrade once you get this one working.
Also, I thought you were going to try unzipping Demetris latest build and flashing through recovery ("Flash from EXT" > choose drive > choose .ZIP) - have you had any success with that?
Moving on .. This post raises a question for Demetris:
First, thank you for all you do. Your work is awesome, and the time you dedicate to others is amazing.
Do you have any idea why there might be problems in your LibreELEC builds on certain hardware, which runs great with the old CodeSnake/Kerber builds? For example, I have S82 boxes and I can install Kerber's builds without any problem.
When I download any of your LibreELEC 8-RC releases, I get boot-loops (reflashing, rebooting, reflashing) if I attempt to apply the terminal "reboot update" method (or directly via recovery).
I'll go back to those S82 boxes that won't run with your release, and install the S82 OpenELEC builds without problem.
Could there be a problem or compatibility issue with your Round S82 builds specifically?
Thank you in advance!
EDIT: Someone mentioned the old "alpha" release in 2016 worked when all of the newer releases did not. I've tried this and indeed the Alpha installs on the S82 boxes. The RC4 bootloops to re-attempt flashing, on the same S82 boxes. What could be causing the problem in RC4?