In Ashley's defense, La La Land isn't a "fight" kind of program. It's softer, more sublime. Either that kept us from seeing the fight behind the outward expression, or embodying the character kept her from having the fire she needed to fight.
I do think that Ashley has rested on her laurels in the past and at certain competitions, but I suspect it's not out of arrogance but technical and physical limitation. She's had a remarkably long career with zero long-term injuries to take her out of competition and never taking off a Grand Prix season (skating at several GPFs, too). But there's been plenty of damage done to her body over the years, including numerous concussions that have impacted her memory. Spin positions cause plenty of back pain. Who knows what else. Injuries ended Mao's career - she's another skater who, despite her 3A, had plenty of jump technique issues so that she couldn't just trust her jumps.
Ashley is a fighter. But this time the fight wasn't enough, which happens.