A generalization (but an accurate one 99% of the time) but most people who 'hate' iTunes do so because their music library consists of badly (or not at all) tagged stolen music which doesn't play nice with the 'it needs to be tagged' nature of iTunes.
If you use a non-iTunes loading software then it still requires that the music be tagged. As someone else said you may be better off changing the firmware to Rockbox. This turns the iPod into a USB Mass Storage player which will allow you to directly navigate through music stored in an MS-DOS folder structure without tags. Either that, or sell the iPod and buy a Cowon iAudio X5 which is a USB Mass Storage player out of the box.