"Well seeing as how I say Varian is just as bad as Garrosh and I get downvoted into oblivion what other answer could there be?"

Maybe you're wrong. Oh, no, that's not possible, it MUST be blind favoritism, right?

"They are the same character..."

Don't state this as some kind of fact. It's not.

"He was in on the Nobles who screwed the masons of Stormwind out of the pay they needed most, which is why Westfall is full of the homeless."

Have you never heard of Onyxia? Have you never read the comic?

"He then attempted to assassinate Thrall during the Battle of Undercity but thankfully Jaina stopped his insane action."

Yeah, you'd almost think he just found out Thrall allowed humans to be caged and experimented on for the plague. Oh wait. HE DID.

"Finally Varian sent SI:7 to kidnap Thrall."

You do realize the implication behind the Alliance Twilight Highlands intro is that BENEDICTUS arranged that for the Twilight, don't you?

"What did Garrosh do even close to those atrocities?"

It has nothing to do with "atrocities" and everything to do with people hating Garrosh because he's a lunkheaded loudmouthed blowhard.