Your tone is not very polite.
The developers of rockbox provide their time free of charge to the world and with no expectation of warranty or support.
As the entire project is open source, if you think you can do a better job, then why don't you contribute some code to fix the issue that you have encountered?
With that said, as I understand it, it is very hard to truly brick an iPod.
If all you did was mess up the ".rockbox" folder in the root of the iPod, then do the following:Power on the iPod by holding down SELECT + RIGHT. This will boot into the rockbox bootloader's disk mode where you can download the latest nightly (at the time of this message) from here:
https://download.rockbox.org/daily/ipod6g/rockbox-ipod6g-20230219.zipConnect your iPod to your computer and extract this to your iPod's disk (making sure to overwrite existing files). If you're using Linux, use
unzip -o rockbox-ipod6g-20230219.zip -d /mnt/path/to/IPOD/
If the above doesn't work, restore the original bootloader via DFU mode and then restore the iPOD in iTunes.If you lost your music collection, then it is entirely your fault for not having backups.