Normally, I am not a fan of this sort of thing either. In the case of Vikings, however, I didn't notice it right away and found myself engrossed in the series from Season 3 on.
As it pertains to 'gender equality' in the Scandinavian cultures of the early 20th century, there is some precedent for it rooted in fact. To be clear, we know little about their culture because they weren't into documenting much of the day to day stuff and most of what they made wasn't built to last. We do know some of their cultural identity because of other people that crossed paths with them and DID write it down, such as the English and so forth. We've had to interpret it through the lens of the time, which any self respecting Anthropologist or Historian would do (you'd be surprised how many in the field today want to chronocentrically re-interpret these things through a supposedly 'progressive' lens). Also worth noting is that the single biggest reason the Nordic raiding culture died out was because most of them converted to Christianity as they migrated to other parts of the world and settled. They adopted a new way of life for social, economic and spiritual reasons. There are enough accounts of their general attitude about things that a perception has formed that indicates they were a fluid people in terms of identity, capable of adapting and not nearly as angry as popular fiction would portray them.
As it regards gender equality, we know that Shield Maidens existed, as well as the Valkyrie in Norse mythology. Both are romanticized as being capable warriors but we don't really know whether or not Shield Maidens were legit fighters or if it was just a ceremonial position that has been inflated to mythical proportions. There IS a documented battle where they took part in some defense but the details of that encounter escape me They're described as being quite fierce but old history is fanciful and that could mean any number of things. We also see in the Eddas that women in mythology weren't written strictly as trophy wives or agents of mystery and chaos to confound and befuddle men but also had agency. I'm just glossing over all f this; I don't have a degree in this stuff. But there's a lot about human behavior that, when weighed with the evidence we have regarding 'Viking' culture (which in itself is a misnomer; Viking was an activity, not a title, but one that makes it easily accessible to the layman), suggests it may have been a more egalitarian society than others.
But all of that said, I totally understand why, in this current climate of how media entertainment is produced, someone tired of virtue signalling in their entertainment might change the channel when they see how gender equality is handled in Vikings.