Scenario1:
"Um, hi. Can I just order here inside? Thanks. I'm really hating the apps now. For sure: one medium cold-brew, please. Yes, thanks, to go. Okay; tap here? Excellent. Oh. Put 'guppy' on the cup. Thanks! [pause] Oh, perfect. Hey, thanks again for letting me skip the app. Those are so frustrating! I'm really starting to avoid any place that uses them, and I'm so grateful I can still come in. Have a great day!"
Scenario2:
"Um, hi. Can I just order here? No? Just the app? That's too bad: I'm really getting frustrated with the app and I'm starting to avoid places that need them. Nope, that's all I needed, sorry. Thanks anyway, and have a great day!"
I like this idea because
- you're affirming the target behaviour
- you're getting a coffee and going
- you're being chipper so they don't feed off your grumpy face
- you're providing feedback without being too much 'that guy', I hope, to the serving staff.
In all things, you don't wanna be That Guy, because you know servers don't need that shit. But, while the odds are slim of feedback getting up the chain of command, you're being clear (and probably more concise) as to how to get more of your business in case the feedback DOES go up.