His "evilness" was mainly built by modern perspective, a mix of templarbooism, of projection of modern culpability on the past(the need to find the roots of antisemitism in the past) and a complete ignorance of how worked finances back then, which was demonstrated posts earlier by another poster.
When you look at the number of wars happening under his reign, there are fews, we can't even say he liked war, he didn't. The only thing which he could be blamed for, a posteriori of course, that he maried his daughter in England. But he had no way to foresee what would happen next when his last son Charles IV died.