Can you help me reformat my disk in recovery mode? Seriously botched Yosemite/FileVault installation
So if I understand you correctly, all you want to do is wipe your disk and reinstall OS X.


Boot into recovery mode
Choose "Utilities" in the Menu bar
Select "Disk Utility"
Select the disk
Click on "Erase" and select "Mac OS Extended (Journaled)"


Then you should be able to do a fresh install of OS X.