They felt the need to disregard the character's history and flaws for the most part, to the point they even erased her memory.
The shameless shilling (in-universe she was suddenly massively popular and one of the most important Avengers) was also a big turnoff for people.
The frequent relaunches and new creative teams don't do her any favors, but that's a common problem with Marvel.
Like, I keep hearing that the new series is solid, but I'm not interested because it's likely to be cancelled or fucked over in a matter of months.
And I know hardly anyone cares, but I'm still annoyed Alpha Flight suddenly became her underlings and they never really got into how or why.