I know you've already gotten a lot of responses, but I wanted to chime in too. I haven't read the other responses, so sorry if this is repetitive. What you are experiencing is perfectly normal. No doubt your daughter is very smart, which will turn out to be a huge blessing. It is very difficult when our children get into everything. I know, I have 5 and they all have gone through this stage, some worse than others.
First of all...you are doing exactly what you need to do with regards to your temper...just walk away. That is what I do sometimes with my daughter who will be 2 tomorrow and truly can be a terror. I have been known to lock myself in the bathroom just to get a moment to compose myself. That is ok.
I'm sure you have already done this, but you need to have all of your cabinets so that they cannot be opened...child proof locks are great. I would also recommend looking at your home again from your daughters perspective, and putting away anything that you don't need out in her sight and reach. Gone are the days when we simply teach our kids not to touch...it you don't want her touching it, you have two choices...battle with her all day because she will touch them...or just put them up for now (be it books, knick knacks, craft supplies, whatever). So, go through and rebaby proof your home. That might help. Then, and I think this is important...find a spot in your home...maybe a kitchen cabinet, or a drawer in her dresser, somewhere that you can put items that you don't mind her getting into. Switch the items periodically so that she can have her curiosity and not drive you crazy!
Last, if you truly feel the same, that you cannot stand your child, find someone to talk to about this...a moms group, a trusted friend, a pastor, someone who can validate your feelings and put everything into perspective. I'm positive that you would never hurt your baby...after all, what kind of mom who cares enough to be on a moms group online would? But, if you are feeling like you can't control your temper, contacting someone to take your baby, for a couple of hours or overnight or longer, would be a really good way to get a breather. I'm hardly ever away from my child (stay at home mom) but if I sneak away to do the grocery shopping without her, when I get home I feel refreshed and ready to be mom again...and that is only after an hour or two away. Imagine how good you could feel with a whole day or weekend off!
Please let us know how this turns out for you. I wish you all the best. Parenting is the hardest job in the world!
mom to 5 with one more on the way