Kyrie is very well liked. Maybe not around here, but overall, he is a huge fan favorite.
This pretty much sums it up. They're not liked in Boston, but Boston doesn't equal national appeal. When you consider they're standing in the sport as a whole, there's really no question that both Kyrie and KD are two of its most popular athletes.
No they aren't. They are superb basketball players (especially Durant), but they are not well like nationally. In Ohio basically no one like either of them and no one really like Kyrie before he asked out of Cleveland either. Just because you are a great basketball talent, that gets talked about by sport's media, etc. doesn't mean you are well liked.
They're both constantly on the list of the league's best selling jerseys (KD at #3, Kyrie at #6 this year). They're both Nike signature athletes with lines that perform very well, Kyrie's in particular is regularly a top seller among all shoe brands.
Sure, there are pockets of people who don't like them but their marketability suggests that they're far more likable than you may want to admit.
Those aren't necessarily signs that you are well liked though, especially personally. Irving is absolutely incredible with the ball, plays in the largest city in the country, and is still relatively new there. All things that would drive jersey sales.
Kyrie has been a consistent top 10 jersey seller dating back to his time in Cleveland, even pre-Lebron. Same with his signature line. He's been marketable pretty much since he was drafted regardless of the market he's been in. Likability and marketability are intrinsically linked, no? How much money is a fan going to spend on merch for a player they don't like?
I think there's a big difference between casual fans and the more hard core "real" fans that causes the divide. Just throwing out some SWAG, casual fans probably out number "real" fans like 10 to 1, if not more. The casual fans aren't invested enough to really hate anybody. A big star with a little bit of charisma goes a long way, and that's what makes them popular.
The things that make players hated, that's not going to make casual fan's radar. Most 8-10 year old kids don't know about all Kyrie's or Durant's locker room issues or behind the scenes drama, they just know they make highlight plays and are in commercials/movies.
It's a lot like pro wrestling. Throughout the years you've had guys like Hogan, Ultimate Warrior, Kevin Nash, John Cena, Roman Reigns, etc. These guys who are always in the main event and among the leaders in merchandise sales, are often the most hated by the "real" wrestling fans, the smarks. It's just that the casual fans far outnumber the more invested fans.
That's basically how you can be a fan favorite and most hated at the same time.