No one with even the barest understanding of regency era is going into Bridgerton expecting historical accuracy. This is just supposed to be a fun little romance that takes elements of regency era but does their own thing for the most part. And regardless, historical accuracy aside, the show is being consumed by a modern audience and so it's not right to depict marital rape as simply a regular couple fight. Not when there are still many places in the world and many people who don't consider it to even be real.