I like being able to have translated content, but the Translate extension is pretty bad.
It's my sense that any time anyone tries to criticize this extension, a small group of people who are closely involved with the extension (Nemo, Nike, and you, mostly) immediately get very defensive. Suddenly the conversation is about pitting people who want full multilingual/i18n support against everyone else. The reality is, of course, a lot more nuanced.
Currently, even very experienced wikitext editors have a lot of difficulty using the Translate extension. The extension takes an already challenging task (editing basic wikitext) and adds several layers of complexity, including difficult syntax and unexpected behavior.
There's nothing wrong with being frustrated by a frustrating feature.