No this is becasue some addon devs had included/Still include libraries in the addon's subfolders like /libs, which get outdated after a while.
If they are properly included with an own txt file AND you are able to download the same library from esoui as stand alone lib to your AddOns dir (just like an addon, via Minion e.g.): Remove the libs from subfolders where there is NO own library's txt file!
This will stop them from being called, if they are old e.g. and the games will load the libs from the txt files in the AddOns/<library>/<library>.txt file).
Attention:
The addons where you remove libs got their own txt files like AddonName1.txt.
Check if inside is a line ##DependsOn: <libraryNameYouJustDeletedInTheSubfolder>
If not: Add one so it will make the addon depend on it properly.
And maybe tell the devs of these addons to PLEASE include the libraries completely with their own txt files OR to strip them from the addon's subfolders like you did, in order to make all work properly together.
If the library is not found on esoui.com then keep it inside the subfolder as there exists some libs which are not released to the public but shipped with the addons somehow. Imo this is no real lib then, and could be handled differently (released on
www.esoui.com e.g. properly) but that's up to the devs of these libs. Maybe some are old and not supported anymore.