I suspect people who look for annoyances in travel readily find them, while people who look for the positives readily find those.
I used to hate business travel, then took a role that required a fair bit of it. Getting used to the routine, finding ways to be efficient, and realizing that even the occasional irregularities aren’t so bad gave me a perspective that while I don’t love it, it’s far more tolerable than how I used to view it.
You have your system/routine, TSA-Pre/etc., probably a club membership. At some point, I also largely said to hell with driving into the airport in most cases and just got a car service; no one pushed back. Whereas in a long ago job I'd sometimes use a shared van service which was... less good.
Still, as you say, some bad travel stories with delays and missed connections but you're better prepared to roll with those punches.
I used to hate business travel, then took a role that required a fair bit of it. Getting used to the routine, finding ways to be efficient, and realizing that even the occasional irregularities aren’t so bad gave me a perspective that while I don’t love it, it’s far more tolerable than how I used to view it.