So I am the GM in my group and We've gotten into the first battle in the campaign and I had them fight a pair of giant spiders. But on the adversaries section, all it said the attack roll for their bite was +6.
I thought that means its the standard attack roll of 3d6+6, but that means they hit almost everytime and wipe everyone out.
So Am I missing something here or was I right all along and my players are just squishy?
A giant spider is a very respectable foe for a level 1 Dragon Age character. In fact, each spider is almost exactly the equal to a fully armed and armoured Warrior PC: they both have comparable hit points (Health), armour, and damage potential (the spider's 2d6+3 equals a warrior's broadsword or similar).
You didn't say how many players there were. But if you have fewer than four players, I can completely understand if they lost the fight. Even a party of five players could easily lose a party member before killing two Giant Spiders - especially if the players are new to fantasy roleplaying.
Yes, it is a quirk of this game that most attacks hit easily. Read more on that subject here: viewtopic.php?f=33&t=10851