ANA is good but isn't even the best airline in its' own country. LH isn't the best airline in its' own group (Swiss and Austrian have better seats/service, and Swiss has equivalently good coverage).
United is probably the best US airline for international but domestically Delta is arguably better.
I detest Swiss for forcing me to watch ads - also their service is hit or miss (okay same for lh) Austrian just doesn’t have any routes I need. JAL is on the wrong alliance thus I have only domestic experience.
United is probably the best US airline for international but domestically Delta is arguably better.