OK, but be aware that that means not just avoiding mega-corporate chain restaurants. It could mean having to give up supporting the local ethnic-food joint run by a humble immigrant family who are just trying to make a decent life and put their children through school, and who may be using quality ingredients in terms of veg, but who are still using palm oil because nowadays everyone is.
I prefer to eat at restaurants where I know they will not compromise on quality, so I accept that I have to pay extra for that, hence I eat out less often than I otherwise would have. On the flip side, every time I do eat out, I get amazing food.
On the occasions where I do eat fast food, my preferred places also fit the quality criteria outlined above. If a place doesn't do things in a way that agrees with me, I refuse to support them.
The problem is that a customer couldn’t really tell that, short of a tour of the kitchen. There are plenty of restaurants where you will be convinced that they do not compromise on quality because the veg, the bread, etc. is superb, but at the same time they are using palm oil because (again) lots of restaurants today are.
If you want to make that lifestyle choice, then you do your thing, but be aware that this pretty much means never eating out, either. Loads of fast food establishment and restaurants today are using palm oil because it is such a cheap solution. You see those huge bulk containers of palm oil at the local hypermarket for a reason, those aren’t for household use.