[sudosysgen]

That's definitely true. However, it's not really arguable that a majority or close to a majority of Crimea was moreso favourable to joining Russia than staying in an anti-Russia version of Ukraine. Independent polls confirm this : https://www.forbes.com/sites/kenrapoza/2015/03/20/one-year-a...

There was no status-quo option because at the time, according to the dominant legal opinion (as in, backed by force), Crimea had already seceded from Ukraine. To consider the status quo that Crimea was part of Ukraine would undermine the legal basis for a referendum without assent from Kyiv, which is why it was not included. It's for sure bullshit to the moral level, but it couldn't have been done differently while still being a referendum on joining Russia. They could have done a referendum on returning to Ukraine, I guess.