Guild Wars 2

I am new to this game and I opened a warrior.
I heard that this class was OP in pve so anet nerfed him.
My question is: after the nerf , this class is now balanced in pve? Or he is UP now?
My second question is how good the warrior in PVP and WvW? Maybe I didn’t search hard enough but I didn’t see any praticular advantage in PvP and WvW on other classes.
From what I understood, a warrior is just a big pile of armor that absorb damage and at last, die.

Again, I am new to this game, I know absolutly 0 about it, so I’d like to get corrections on what I’ve said about warriors cause probably it’s wrong.

Thanks.

King in PvE
good in WvW
not bad in PvP

At the moment every class is viable in all settings.
Of course though, some classes get more results; i.e. in WvW a Warrior is better at chasing people than say a Guardian, so you get more kills. But a Guardian is better at holding a point and supporting a group defensively.
It’s all about what you want to do in the game.

What a Warrior is good at more than most others is dealing big direct damage and chasing/escaping.
Your goal as a Warrior is to get someone down fast and rush away, it’s a very adrenalinic and fast-paced class.

Skill is still fundamental tho. Some Warriors I meet definitely fit your definition of “useless walking bag of health”, but others are a very serious threat.
If you l2p you’ll be a fearsome death-dealing machine, else you’ll just be that Warrior who jumped in awkardly, messed up and attempted a pathetic escape.