Truth!
They'd defend it as "well characters change", but it wasn't "natural change" it was "they did whatever the heck you wanted to serve the plot"
The thing that makes me cry in bitterness at the insanity of it all, is that BOTH Jamie Bamber and Katee Sackhoff complained that by season 3, their characters were utterly directionless. They actually complained, right?
Well, the writers *literally* comfort themselves with "losing" Apollo for 30 episodes (back half of season 2, all of season 3) by saying "well he was utterly directionless and shifting all the time....but then again, doesn't that happen in real life? People have existential crises don't they?" which if you step back and look at it, sounds ridiculous coming from the mouths of writers who used to pride themselves on their characterization skills.
But Sackhoff just bought it hook line and sinker: she complained "I don't know what Starbuck is even DOING in some episodes; there's no reason for her to be doing these things"
And she said, "the writers responded....'work with that! That's what Starbuck IS feeling now! she's lost and directionless!'.....and I realized how brilliant that was!"

UGH
By that logic I could literally say Janeway had schizophrenia or bipolar disorder, to explain why one week she acted like a pastiche of Kirk, and the next week, a pastiche of Picard.