Welcome to the wiki! @Sir memes a lot more than needed can give you some links. And I don't really have a strong opinion of whether he's good or evil. I don't think he's evil, but he's not totally misunderstood- he was a bully.
He's misunderstood...he brought up his son not to care about blood purity or lineage...and even let him befriend his nemesis's(dunno if Harry's a real nemesis or something) son...he could've stopped him from befriending albus...