Yes, every other language has flaws on Unicode handling. But those flaws persist exactly because they are not important.
It's been I long time I don't write a "Unicode handling" application, yet the only environment where I ever got problems with it on the last decade was .Net. And it was a very small problem, worked around in less time than I've lost on this HN page.
For most people the Unicode handling isn't the main problem they're solving, and most languages are more or less good enough now.