Is it really okay to never hold a grudge against anyone?

Yes it's ok, no, not about who is 'better'. I don't hold grudges either, and I've had bad stuff happen to me (not as bad as some, worse than others). It's not about seeing the good in others though (it's important to learn lessons and avoid giving known bad people more chances to hurt you, after they've proved that they would). But holding grudges ties you to them, ties you to memories, drains your energy, and constantly keeps you from being fully happy - and at that point it's you choosing that, long past the harm they've done is past. I've seen (we've all seen) people destroyed by their grudges. They are constantly thinking about 'that person', they can't open up fully to anyone else, they have 'the bad things' playing on an infinite constantly escalating loop, they bring it up all the time until they drive their friends away, and so on. The 'bad people' handed you a rock, it's up to you if you keep carrying their gift or you put it down. And the easiest way to move past is to forgive them, and the easiest way to do that is to see and love the good in them as you walk away (I can love the good in a tiger after I know to keep it at a distance)