Affiliate Marketing Secrets

you’re leaving a company, in part due to this person’s poor management. in the past you’ve called them out on being a sucky manager (bc it affected you), so it became personal for them.
you have professional reasons: they’re lazy and incompetent. you have personal reasons: they’re biased/unfair and passive aggressive
co-workers you actually like who are equally unhappy are also encouraging you to write the letter.
so do you write a letter to HR or cut your losses and hit the road?
keep in mind you already have a reference for this company that’s in no way affiliated with the sucky manager.