Opas entire explanation falls flat on two things:
-If Quill and Papaya have such a rich history together, if they have been friends and/or coworkers for such a long time, why is she just now getting pissy with him? He was hired to write things for Papayas shop, so he either had the qualifications for it or she deemed him as such a good friend she just hired him due to that. Yet she calls what he wrote shit and tells him he is a shitty friend for not instantly getting over his issues to show feelings.
As mentioned before, friends should not yell at you for having some sort of issue with showing feelings. It does not help the person in the slightest. If Opa is defending this, then only because PK keeps ensuring that its for "his own good", aka, just as Papaya is implying too. She is "not doing this for her, but for him".
-If abusive relationships are based on taking power, then yes, Papaya IS abusive. She is his boss, she can take away his job if she ever wants to. She tells him whether something is shit or not, she alone dictates what is okay to write. She says that she doesn't want something catering to her, yet Quill even points out that that is exactly what she wants. She treats him like shit but then turns around to make it look as if she cares about him. She yells at him, because she has to "put him in place" even thought Quill appears to want to be better, he is just scared of showing feelings. But according to Papaya that fact makes him a shitty friend, so lets yell at him a bit more and let it appear as if Quill is nearing a mental breakdown.
Opa can explain all he wants in the comments, but fact is, what is shown is an abusive relationship. It's like trying to explain that young tigers visiting a brothel is okay because "they didn't really take their services" .