Do co workers tell you to enjoy your lunch in a passive aggressive tone ?

So far, it's hard for me to be too comfortable at lunch with them. In a way, I feel more comfortable talking to adults because I was the youngest in my old company.
But sadly, even the managers here don't feel like adults to me.
I guess it's the experience. We just don't share the same experience so they feel childlike and immature to me. But also, I don't really open up, I suppose.

Another thing is they tend to eat on budget. So on occasions, our preferences for the day don't align. I do budget too, but I make sure to budget for myself enough that I can eat what I want. So yeah, there's a gap there that I actually am not enthusiastic to bridge. I just interact for work mostly. Those people don't feel like my kind of people, at least, not yet