I often see mums here being accused of mummy martyrs but is it not the case sometimes that some DHs will simply pop the kids in front of the tv for hours with some sugary snacks, something which the mums could just do themselves anyway if they wanted downtime? I know that there's nothing wrong with a bit of tv and unhealthy food but often you know it's going to be more harm than good, like if they've had trouble sleeping or are going through an adjustment
I know that I feel I can't simply "leave DH in charge for the day" because the only ones who would miss out are the kids (and maybe me later) who would be bored and emotional. And nobody would learn from it because DH would never understand that was a problem. He is actually pretty involved, does bedtime for DC1, cooks and we are otherwise equal partners so no need to LTB but I'm absolutely the default parent. He'll quite openly admit he puts his needs for sleep and relaxation etc first whereas I'll put the kids first (within reason, as they also need a sane and functioning mum) and I don't think that's being a martyr but the right thing to do!
I'm not sure what the answer to this is on a society level but do feel sympathy for mums accused of martyrdom. This doesn't apply to the competitive martyr mums, which is a separate thing altogether!