This is an article with a long introduction and then jumps straight to the point in one, final paragraph: Russia is abusing it for political messaging again. While yes, any tool will be abused like this, it really is also a tool to best codify spoken language of the Slavs (in a sense, it is trivially provable that Cyrillic script is better adapted even to languages which do not use it today, but have to resort to digraphs or glyphs with diacritics — some are thus not using it to distance from a particular influence instead).

None of the interesting bits of Cyrillic invention are covered, like how the original Slavic script was Glagolitic as the sibling mentioned, and only evolved into modern Cyrillic much later. Or how there was no lowercase until a few centuries ago, especially with the reform of Peter the Great.

With Slavic people, it's also worth noting that "Slav" actually means "word" or "letter" (of an alphabet), so legibility was part of the identity. In contrast, most Slavic people call Germans a variation of "Nemci", or mutes (those who cannot speak) — notably, most except Russians who call them Germans. Again, likely to distance themselves from the negative connotation with their aspiring historical partners.