Yeah, I don't like it. At all. I mean, I might like it at some point; it may be super-duper fantastic; but I simply do not have the time right now to figure it out.
So. When you sign in to your blog, the dashboard that pops up should have a cog-shape, somewhere on the upper-right area of the screen.
Click on that cog, and it will drop down several options, one of which is "Use the old Blogger format." (Or something like that - I don't remember the exact wording.)
Click that option, and you're back to the old Blogger.