She had some rough moments with him for about two episodes, but people seemed to just switch off and forever took that as fact.
I saw someone who was inquisitive and at the end of the day was talking to a machine when her deal was healing biological lifeforms. She didn't get it entirely.
But she adapted. I saw nothing but respect from her after that, she dealt with Data properly, she apologised to him when she got things wrong, she played on the holodeck with him, fought his corner, was his ally in Penpals. It was part of a wider narrative of her being very adapting, see also the Klingon tear ceremony with Worf.
35 odd years later (I'm not having a go at you here, as you summed up why people took to disliking her quite correctly) I admit I'm still fed up with the "Oh Pulaski was mean to Data!" narrative. It was mild, for a brief moment and he can't feel hurt. Get over it, it's been decades already!
In fact Beverly acting like a stuck up bitch in Generations because of Data's joke, leading Data to have a crisis of confidence and stick an emotion chip in his head which fucked him up I'd say is far worse than anything Pulaski ever did to Data. We're maybe aiming at the wrong doctor.