For Instagram with you needing to log in to view pages, you find that you can’t find opening times for restaurants etc because many places use it to advertise that they’re open/closed at short notice.
I went and found forums for the hobbies I'm into, rather than social media groups. Thankfully, most of the underground music I'm into also maintain their own websites, while some of the more hush-hush groups maintain members-only email lists. If they don't do either? Well, nearly all of them sell tickets online via mainstream ticket vendors regardless of how underground they try to be, so I'll see the info eventually (and, hell - I know the event's coming up and I've put it on my calendar, I don't need to see an IG story about it every single day for two months reminding me). For backpacking, forums are fantastic compared to the oft-repeated and overrun social media groups.
For restaurants? Meh. So what if I show up and a place is closed on short notice? Worse things can happen than wasting a little bit of time. Do they only share their menu on social media but my friends swear it's amazing? Fine, I'll experience it O'Reilly-style ("We'll do it live! Fuck it!").
I don't need to know everything all the time, that's part of the adventure! And if I really do need to know something about a place that only posts on social media, I've found that I can usually find that info elsewhere if I dig hard enough.
This one is fine til it ruins your plans. My wife and I have a toddler, we went to a local Lebanese place for lunch on the one day a month we share working from home, place was closed, so we went home, no nice lunch out, found out after it was posted only on Instagram that they were closed. The other options close enough to where we live to nip out for lunch are... Mcdonalds or Burger King. I don't live in a metropolis.
The point of days like that, and what I highlighted to my oldest when we had a similar disappointing outing this weekend (we all wanted to grill in a park, packed everything up, but forgot it was Easter and every other family had the same idea and we were screwed), is that we still get to have a nice time with family one way or another, regardless of what we're eating.
It's definitely disappointing when time is super limited, I completely empathize! I guess I just always try and highlight the glass half full aspect of things and use that to find a way to make the best of a crummy situation.