Exactly this. Humans have incredibly complicated writing systems, and all Unicode wants to do is encode them all. Keep in mind that the trivial toy system we're more familiar with, ASCII, already has some pretty strange features because even to half-arse one human writing system they needed those features.

Case is totally wild, it only applies to like 5% of the symbols in ASCII, but in the process it means they each need two codepoints and you're expected to carry around tech for switching back and forth between cases.

And then there are several distinct types of white space, each gets a codepoint, some of them try to mess with your text's "position" which may not make any sense in the context where you wanted to use it. What does it mean to have a "horizontal tab" between two parts of the text I wanted to draw on this mug? I found a document which says it is the same as "eight spaces" which seems wrong because surely if you wanted eight spaces you'd just write eight spaces.

And after all that ASCII doesn't have working quotation marks, it doesn't understand how to spell a bunch of common English words like naïve or café, pretty disappointing.