She's on the right wing of the ring wing party in the UK, so she's likely not a good candidate for a general election where you need at least some centerist support. This is likely why Labour are doing well with Kier Starmer as he's palitable enough for modorate Tories to vote for.
it's worse than that, if you want to appeal to "the right wing of the ring wing party in the UK", then being either a woman or a person of colour is a disadvantage with that specific group of voters, more so than with the general UK voting public.
