I admit that I never sat down to understand the latex design principles and learn it the hard way. So maybe I'm just uninformed.
But seriously, I just want to write some text with formulas.
The error messages are so useless, usually I'm forced to trace a bug by commenting out sections of text. For even the most trivial features, packages have to be included. Finding the right set of compatible packages is a science on its own. Usually you start with somebody else's document header and try to tweak it to your needs.
And good luck placing an image on the page where you want it.
I assume that if you spend some time understanding the language, it becomes clearer and less of a mess.
But I feel like there is room for a declarative text editor that's a little bit more intuitive.