I recognise that Pinterest is a pretty big player in social media and seems to have relatively broad reach (first heard about it in my country maybe in 2011?).
It just seems Pinterest (as a product) is really subpar compared to say Insta, TikTok or even Twitter. I am not talking about their commitment against the interests of the user/public (they all suck on that front), it's the UI/UX and subpar features.
One big one is slow loading and display of images. It's always slow and they didn't even try to design it in a way that would perhaps move attention away from this.
Their image categorization algorithm and source/context provision is a joke.
While I hate Google Lens with a passion, it does seem to have the most powerful source identification feature and it can come up rare variants/sources that are not available though other such systems.
My focus is on research though, not commercial activity so my use case is probably not important to Pinterest.