> The worst thing which can happen is that there is some misunderstanding and you are delayed a bit
Even so, the little things alone can ruin the experience, before adding the big ones.
Maybe it's a busy day at the airport and you're stuck in a surprise 2h security screening or passport check queue. Maybe you're pulled over for a routine check, or 2, or 3. Maybe you have 1kg over weight for your hand luggage and they expect you to check it in for extra cost while others are allowed with oversize luggage. Maybe they keep changing the gate 2-3 times and you have to constantly be alert and ready to move around the airport. Maybe your flight is late 1h or 7h. Maybe you have to sit in a crowd with dozens or hundreds or people in the (off)boarding area. And so on. There are just so many more ways to be irritated by air travel.
And that's just before you are on the plane. Seat comfort-wise air travel is probably the worst option. I'm above well above average height so I have to pay extra for a decent (not great) experience, or be ready to do the check-in the first moment it's available, or if there are no sits with extra leg room I'll suffer for hours, or be hit over the knees with the different carts by every inattentive flight attendant if I try to spread towards the aisle, or sit behind someone who reclines their seat the whole way.
There's only so much will you can have to have all these things slide. It's like saying that whenever you get punched in the face you can lean into it to make the experience better. It will still very much suck, just marginally less. And I flew hundreds of times, I tried all the tricks. For average travelers there's a ceiling for their air travel experience and it's in the "hopefully tolerable" range. And I tolerate it because I have no choice but it's objectively a bad experience almost without exception.