Since there has been some discussion on this, I'll add a few things. I'll try to separate out my points for clarity.
So, first: The entire concept of the "bus" relies on an assumption of competence with TPTB. Or more, that they're not incompetent. I think this has to be valid. TPTB know what they're doing. They know what they want and the best ways to get there. It doesn't always work out but they aren't idiots. They know their audience (probably even better than we do), how a song will be received, and what the implications are.
Kyla was hit by the bus. Hard. I remember seeing/hearing her songs and instantly realizing she had 0% chance of winning. IIRC she also performed both of her solos in the first half of the show. Even IF it wasn't intentional, based on pure negligence, the songs she was given made it certain she couldn't win. I don't think Brynn being given a "boring" (not bad though!) song in bloodbath in the first position is a sign she had an insurmountable lead either. For one, it's clear that going first is not the "death spot" anyway (Kyla went first t10). Instead, I think Brynn just had a high floor with the largest devoted fanbase. I think she was always getting 1st or 2nd in the finale because of this. Kyla relied almost entirely on casual votes.
And yeah, of course when an artist gets bamboozled, their fans aren't pleased. But there's a difference between resenting the treatment and just being unhappy with the results. Whatever happened with Kyla doesn't take away from Brynn's win. But it still feels awful that Kyla wasn't even provided the opportunity to have good performances (or at least good studios ).