Something people need to understand, including the pro Kiara people is that Kiara's other life spans a period of 10+ years by now.
The claims of manipulative, whiny, egotistical, etc have some truth to it in the past if you dig up old videos and social media post, and go deep in farms and archives. She had stupid fights with people, stupid competitions, desperate ways to look for validation and just feel better about herself and have company, because in all honestly she had a really shitty life and not a bright prospect for the future, and she knew she fucked up her career and was full of regret and resentment over life and over herself. I think this is part of why she does take antis opinions seriously, and she even said in a stream that even what haters say can hold some truth to it, so that's why she reads them.
The thing antis don't get though, is giving people a second chance. They keep her flaws from her teenage and young adult years as their image of who she is forever and have closed the case on her, and because of that they try to spin anything she does in her current life through the lens of what she used to do. They recycle the same old attacks over and over, but each week, each month, time passes and those attacks grow weaker and weaker, because they come from a time that each second is more and more distant, and the mental gymnastics needed to believe those narratives are more absurd the more time passes.
Kiara was frozen in the past for a long, long time, but she tried to pick herself up many times as well, and she fucked up each time, but with each fall she learned to be more humble and grateful, the importance of listening, of celebrating accomplishments, to give others a second chance; while others mature into becoming more cold and distant persons, what her growing years taught Kiara is how important it is to open your heart. That by opening your heart to others that hate and resentment can disappear, old fights can be resolved, and maybe, just maybe, it can lead you to meet more people and not be alone anymore.
Yes she's still a frail girl and can fall without the love of others, she cries her heart out very easily, she's not the smartest cookie and has done stupid things not that long ago, she beats herself up even for minor things and she's clingy and a bit crazy, but that's what makes her so endearing and so important to be at her side.
Now that she finally has the chance to live her dreams in a big stage, the people who give her that second chance can see all her qualities bloom like sunflowers or shine like a ray of sun. That's she's a bit (a bit?) airheaded, really emotional, insanely hardworking, and yes a crybaby and clingy, but also really sweet and wishes the best to everyone.