CACTUS FLOWER: a prickly dilemma - to like or not to like

I'm clearly out of step with mainstream opinion regarding this film. I thought Goldie Hawn was the worst thing about it, yet she won the 1970 Best Supporting Actress Oscar for her performance.

Picking up the ultimate acting award for your first big big screen part is quite an achievement, and she certainly shows there's more to her than the high pitched dumb blonde she played on Rowan and Martin's Laugh-In, but she relies too much on biting her lower lip to express emotion. It frankly makes her look gormless.
The other downside for me is the script. It's far too theatrical. The characters spout lines designed to be declaimed in the cavernous darkness of a theatre (which is where this story originated) and not in the more intimate, naturalistic setting of the movie theatre. I don't go to the cinema to see a filmed play, I go to see a film. They're two different arts and require different approaches to the material.The script for CACTUS FLOWER has too many 'zinger' lines where I could sense the performers almost pausing to wait for the audience reaction.
On the plus side Walter Matthau delivers those lines with such style and wit that he almost makes up for the downside. And Ingrid Bergman is wonderful as his receptionist with a crush on him. She not only gives a great performance but also looks so good it's hard to believe that almost three decades had passed since 'Casablanca.'
For me, Matthau and Bergman were better than the material they were given to work with and that's why I stuck with the film all the way to it's predictable end.