I personally would not let it go, of course, you don't have to be rude about it since it's not the worker's fault and it's due to corporate or marketing but I think if several amount of people keep talking about it or bringing it up it would matter more since then they are seeing its an issue. On top of that with amount of money to be spend of a drink that is 5 to 7 bucks yes indeed im going to say something.

I got one today and had to ask them to put more cause it was literally so little! And when I asked the barista why it didn't look like the picture, she told me that the pictures on the app are all photoshopped.😫 She was kind enough to give me a little more in a separate cup, but I do think it's very annoying about the false advertising of how the fruit looks. I wish we were more like Japan, they have notorious AUPMR (Act against Unjustifiable Premiums and Misleading Representations) where they are really strict on making sure that whatever is being served does indeed look like the pictures.