How can I downgrade my pre-installed Yosemite OS X to Mavericks?

So the hard drive on my Macbook Pro inexplicably crashed, and I had to take it in to get it replaced. The new hard drive meant that I ended up with Yosemite OS X instead of Mavericks, as I had previously, but I'm finding Yosemite to be terrible and it's greatly inhibiting me. Is there some way I can downgrade back to Mavericks OS X, despite it never being installed previously on my new hard drive?

Boot into Internet recovery mode and reinstall the OS. If told you can't, then make a bootable backup/clone or Time Machine backup of your Yosemite installation, erase the HD, and reinstall the OS. It should put down that which came with the machine.
27" i7 iMac (Mid 2011) refurb, OS X Yo (10.10.1), Mavs, ML & SL, G4 450 MP w/10.5 & 9.2.2

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