My preferred way of dealing with 'crapware' is to first of all keep it from running at startup. Undo all unwanted/unneeded auto-start programs and processes. If it's not going to be hogging your system resources I don't see any need to delete it before you have a chance to play with it and see if there's anything in the suite of crap that you might actually want to keep. HDD storage is inexpensive.
And if you did format and start over you'd probably be re-loading the 'factory default' from the hidden recovery partition that would load the crapware right back in.