The numbers are in!

Check again. Season of dogsh** is just that

Personally I think the -_- thing is hilarious. It’s Eyr’s signature.
I like to imagine it as if Eyr has been so disappointed with every Blizzard update for decades that he or she is now cursed to a constant state of apathy for any news or anything related to WoW and its warped community.
But it’s probably more realistic to assume he or she is mocking or throwing back to the emo kids from mid 2000s who overused that emoji.