Ariba is so bad

Our clients make us use it for vendor registration and management, plus invoicing and other stuff.

It's horrible to manage, overly complicated, not localised well enough for Indian processes or legal compliances, yet the big MNCs use it and ask others to sign up as well.

One of our invoices was stuck for months due to lack of support from client and Ariba.

Where did this hellspawn come from and why do people use it? Can anyone tell me?