I agree it can be really frustrating losing to crazy cards but....

You should reread the first part of your opening.  You've only been playing a week :P  Don't sweat it.  You aren't wrong though, sometimes I lose simply because he top decked a legendary.  Sure it may of had a 1/5 chance of hitting me in the face for 8 damage.  Lucky for him it seems to work 5/5 times.  Regardless don't focus on the goldens, the legendaries or any crazy cards, your cards have the exact same ability to impact the game just as significantly if played right.  Plus you are really new so don't sweat it.  Also keep in my matchmaking, casual and ranked is a little wonky right now.  My win rate before the last patch was around 50/50 and now not even close to that so you are facing harder opponents then you should be.  Also let me just say I don't play druid and am pretty bad at this game myself but heres somethings I'd think about adjusting: You stack a lot of spell damage but swip and starfire are your only spells, their are much stronger 2 and 4 drops if you aren't REALLY putting that spell power to use.  You probably could do ok wiht just one Ironbeak owl, besides the silence its really weak and you have pretty devcetn single target removal.  Its hard to visualize it from the list alone but I think you have too many spells and not enough core 2-3 drop minions.  Just focus on improving, play 10 games, write down what class you lost and why you think you lost, take note of what cards didn't seem very useful in any situations or were useful in only very limited situations then after that go adjust ! :D