It's not a great teaser trailer... It gives enough to get a bit excited: ND taking on sci-fi, retrofuturism etc but on its own merit in the pool of expensive AAA titles, we need a bit more.
But 90% of the negativity is orientated around the character. Brain rotted dudes online concerned about DEI ruining their medium. Certain people have just been hit with the realisation that they are not the sole demographics/target market of the industry and they're struggling to cope with it. Not every character is design for you to find hot and you may just need to spend more then one cutscene with a character to determine whether you like them.
Trends come and go in terms of casting and character design, ND isn't above this, but there's really nothing to get worked up about in the meantime. Wanna see her in action and within context of the story (suspecting she isn't bald the whole way through)