I don't see there any anger just sarcastic comments instead anger he is rarely serious and his anger even more as far i remember moment he was angry was moment i started criticize mages for example like in tree conversation.
He kicked only orlesian army and wardens not other peoples still i didn't saw any others who wanted save the world for example varric or cassandra.Yeah because for example cullen have something to add 3 time in the series... 
well we should check
daa anders funny , sarcastic , easy going , irresponsible and self-centred.
da 2 anders serious, grumpy , obsessive , and centred on others.
No, Riverdale is correct. There are a few points where just asking him about Templars or the Circle sends him off on an angry rant.
We're not told of anyone else trying to get into Fereldan. Why would Cass and Varric come to help? Cassandra was either by the Divine's side or doing something for her and Varric is just a merchant/Information broker based in Kirkwall. If the Blight left Fereldan and the rest of the Wardens hadn't stopped it by then, then some characters may have gotten involved. Most likely it would have headed to Orlais and the Chantry would have gotten involved. Varric would probably still be chilling in Kirkwall because he's not the kind of guy to go off and play hero.
Most of the returning characters are world leaders like Alistair and Anora or were actively recruited into the Inquisition like Leliana and Cullen. Not sure how Varric ended up there yet admitedly.
Morrigan probably has motives of her own and Hawke by now is the kind of person to run off to play Hero.
Some of those traits are actually Justice's/Vengeance's. Anders isn't Anders any more. He's a mishmash of Anders and Justice. Who wouldn't be grumpy in his situation.