Of the mainstream languages there probably aren't too many. But probably COBOL? C++ is pretty hateful too. Oh, bash is a nasty language too. Your "worst" is pr

Of the mainstream languages there probably aren't too many. But probably COBOL? C++ is pretty hateful too. Oh, bash is a nasty language too. Your "worst" is probably ill-defined: C is bad for web programming, but is certainly an elegant language and pretty good in its niche.