But some code really does suck! I mean, really. I don't disagree that often I fail to understand why someone did something a certain way, on the first reading

But some code really does suck! I mean, really. I don't disagree that often I fail to understand why someone did something a certain way, on the first reading. But after I understand all the logic, and have run test cases etc., the fact that code is poorly structured, buggy, full of duplication, excess global variables, etc. is sometimes unavoidable. When that happens, I have to conclude that it does indeed suck.