It's not the inflight service that is a problem. In general they are good. I've flown intra europe in Economy and long-haul in business and first. In general inflight service is very good. But the ground service sometimes is a nightmare. Rude check-ins, not registering miles, bumping from lounges, not taking good care of lugage and saying that you've got an aisle seat and on board it appears that you got a different seat. As they say in their commercial "Making the Sky the best place on earth" but you could add " and making the ground like a real hell".
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Cheers,
Brenno.