What's stopping you from installing 5.3.2 back is the title version of the "version.bin" file.
Each installed system file have an internal Version number.
When nintendo release an update, it increments that version number of the file. that's how the console know that it has to replace a file. (install the update)
The console's Title installation function has a protection to prevent installing a lower version of a file. you can reinstall the same version or a higher version only.
Version.bin has different "internal"version.
example with EUR version.bin : v17, v96, v144, v178, v192, v195, v368, v384, v400, v432, v448, v464, v480, v496, v512
the content of the version.bin file v496 is for example "5.3.2" (I chose randomly, I don't know which title version was 5.3.2)
v512 is "5.4.0"
v528 is "5.5.0"
etc.
We can't edit the content of version.bin to be v496 but contain "5.5.0" as it requires the title to be signed.