I think it’s all very well an EA advising about the state of the market, and perhaps highlighting some issues in a property that may hinder or help the sale. Observations made to the EA, to be passed onto the vendor after viewings could reflect those
comments re. the kitchen etc,
However, to be told, in ‘no uncertain terms’, is just plain rude and unnecessary. I’m wondering if the OP has invited 2 or 3 EAs to view and value the property, which is what I would’ve done, before making a decision on which EA to instruct.
It’s certainly true that a lot of people just can’t see beyond the decor which is why viewing show houses is so popular.
As others have said there shouldn’t be a problem, if the house is priced to reflect any necessary work.
However, it really sounds as if the OP should instruct a different agent - remember they work for you, not for the purchaser. You are the dog, not the tail!
Fingers crossed for a sold sign soon.