I read that sentence as saying that Siri is an example of something that ISN'T a "weird AI girlfriend": that what they want is Siri but better, as opposed to so

I read that sentence as saying that Siri is an example of something that ISN'T a "weird AI girlfriend": that what they want is Siri but better, as opposed to something that isn't even named in that sentence (but likely is trying to be a dig at Grok, but is failing to do so as, as you say, people consider ChatGPT's own products to have a bit of this issue).