Now, I’m not talking about her character design. I’m one of those few people who didn’t completely hate it. To me it’s okay. No, I’m talking more about her stats and kit; she REALLY got screwed over.
Her anti-Roman skill is borderline useless (until her rank up), her guts could have been something more fitting and her party wide arts up can be outperformed fairly easily, even at Max level. Her only saving grace is her fully upgraded NP, which can really buff up the party, but there’s one significant problem with that; Mash fullfills the exact same role but better. Better defense on demand, invincibility, self-targeting, NP battery and more decent stats. Two biggest things, however are that Mash has a lower star weight (while Boudica absorbs all of them) and that Mash has a lot more flexibility due to no team cost.
All that said and done, it’s no wonder Boudica has it so bad in several tier listings. Hopefully we can get an avenger version of her in the future that’s more well-thought out.