Also why does she have to make perfect decisions? A major theme of the movie is failure - and every single other main and minor character fails epically in some way.
She doesn’t have to be perfect. She isnt a good leader though. She’s petulant & needlessly adversarial. She backtracks, & neglects to share plans (demanding blind trust).
Yup, that's what makes her interesting. All of what you say is clearly on purpose. Poe is the sympathetic character, he hates her guts and the audience is supposed to too.
She was not there to be hated. She’s there to subvert expectations. ie purple haired, pansexual, SJW’s wearing evening gowns make great military leaders too.
yes those are all good representations of strong female leaders. But it’s 2018 now & SJWs demand more representation than white women. "go asians" - jj abrams
She was absolutely not portrayed purely as a sympathetic character. Poe fails for not respecting the line of command, she fails for ignoring the heart of her followers.