you're hard on ariana, it was her first season, she had crazy pressure because her fans always demand that she be PERFECT and that she doesn't make any mistakes
they were really mean to her, i found her pretty good for a first season, she was funny, very nice to her team (few coaches have been as nice to their team as Ariana, to invite them to her house , crying with each elimination...)
so yeah she didn't make the right song choices for her team but doesn't feel as harsh she wasn't a disaster as you can tell.