Restaurant patron ethics, on the part of the seated

Despite my bitchy exterior, I am usually not obnoxious in restaurants. Years go by between episodes of even minor furor. Say, five years..

I have questions on the other side, when a restaurant seems at a glance, or more than a glance, to be trying, re what to say to them.
Diane and I have considered having lunch at a cafe for months, but as it worked out, we haven't until today. We were both attracted to it. A non chain.
Not very busy. Menu interesting. Fragile seeming waiter (waitress, is that a word now?)

By their menu, they are working at it. The waiter told us about their roasting their own turkey (did I hear that right?) Maybe they heat the bulb from the meat purveyors. I don't think the waiter knows about real roasts, and that is not knocking her.

Diane's meal was delicious. Mine was the worst hamburger in quite a while, near burned on the bottom, well done and beyond, when I'd asked for medium rare, but also observable as a corporate meat patty.

But the burger was in a really good bun. Good, but dense. Impossible to eat with a hamburger, but seemed a real bun. A totally plain lukewarm dense bun.
Still, it came with a roasted red pepper, and some sliced red onions, and a peperoncini. And the fries were good. The fat kind, but cooked well, good spicing.

Meantime, I'd seen a disabled person beyond the kitchen door, figured it was the waiter's father, the cook. But per Diane's questions (we have different roles, I'm the bitch, she questions) it isn't a family place.
The waiter responds to Diane on how they plan to stay for a long time.

We both like this place. Apparently they bring stuff in from local good bakeries in the morning.

So........... the question. Should have I conveyed my opinions?