What are you trying to do that Disk Utility can’t do? It does everything necessary to manage Mac disks, including formatting and partitioning. Instead of trashing it, let us help you.
My most recent two issues were:
Disk Utility refused to let me do anything to the partition table on an externally attached hard drive - partition option was just greyed out so you could do literally nothing. I needed to change it from MBR with 2 partitions to a single with GPT.
Second was attempting to reformat a FAT12 (not a typo, was emulating a floppy) formatted flash drive, Disk Utility refused to touch it in any way, partition option was greyed out, everything else just spat out an error stating that it "failed".
Both were solved in about 10 seconds using diskpart from the Windows command line - after spending 7 minutes digging the Windows system out of it's cubby, plugging it in, and booting it up.
I bought Diskwarror years ago, back in the late Powermac era. I ran into some kind of an issue with it after a year that had me ditch it. Disk Utility was far less horrible back then so there was less need for it anyway.
I have used the diskutil terminal command before, last time being when Fusion debuted I tried making a hybrid RAID 0 + Fusion startup drive (it worked!). It keeps slipping my mind, I'll need to give it a go.
I also just recalled I have Acronis Disk Director 12 which I think is a bootable disk. I'm not sure if it's new enough to work with GPT, but if it is it could be an option.