I think it's too easy to look at the imperfections in other people's relationships and think 'well I wouldn't put up with THAT!'
But when people post on MumsNet, they tend to post only a snapshot of a current situation. So, partner has been lazy round the house over lockdown despite being at home, so keyworker wife has to come home and cook the dinner.. put on it's own, it sounds awful, and of course the wife has posted because she feels like she's at the end of her tether coming home after a hard day working with covid patients only to find she has to cook the dinner.
But what she hasn't put is how amazing he is with the kids, how he's taken on the school runs, how he holds her at night and says everything will be okay, how he keeps up with the gardening and the DIY in the house .. and how he's struggling with low mood after losing his job at the start of the lockdown.
Okay, that's not a real situation, but what I mean is that on the face of what people post, it's all too easy to say LTB, but that's not the full picture. My partner is an absolute pain in the arse sometimes. We argue. I end up doing more than what I think is my fair share round the house. But at other times - what I think constitutes the vast majority - we're laughing, joking, shopping together, watching films together, making plans for our business together, and it's all good. But if I was posting on here, I'd just post about how he does nothing round the house, none of the good stuff.
You can't understand a relationship that you're not in, ever. Of course there are some cut and dry cases like in abusive relationships, but on the whole there are two sides to every story, and most of the time the bad parts of a relationship are actually outweighed by the good - or we wouldn't be in them!