You're absolutely right, she just kind of lost her spark somewhere, and similarly to Lily, it's the constant moaning and complaining that is making her ugly... They both have seemingly great jobs (who wouldn't want to work from home, creating content for all these great brands), they get gifted a lot of of everything that us mere mortals have to pay for, they travel and do activities for free (in non-covid times at least) and yet they just don't seem fulfilled...
Katie's attitude is just wrong too. I follow a YouTuber from my home country and she has had some health issues, wasn't allowed to exercise for a long time and put on weight a little. Now she's feeling better and was given a go-ahead from her physio and she posted a few happy selfies from her home gym, showing her slighly curvier body and saying how pleased she was that she's moving again. What do we get from Katie? Tummy rolls, chocolate and booze, and never ending feeling sorry for herself.