Sacrimonial 

A mix mash of sacrificial and ceremonial

He had a sacrimonial burning of his work uniform to release him from the demons created by it

Sacrimonial by SullyGSXR April 20, 2022

Acrimonial

A negative endorsement of a product, person, service , brand etc

the opposite of testimonial.

after a poor experience at a restaurant people often send out a stinging acrimonial using Twitter.

Acrimonial by enovapr December 13, 2009