The mating bond has some pretty horrible implications.
Men seem to be the ones primarily affected by it and it makes them instantly obsessed with and possessive over the woman they're 'mated' to, even if they've never met before. The woman, on the other hand, doesn't necessarily reciprocate but its hard for the man to stay away, so she's stuck being hounded by a borderline stalker. The men get violently jealous over their female mates even if they've been rejected, so it can't be pleasant if you're a woman already happy in a different relationship (or just talking to other blokes) and your unwanted suitor starts throwing his weight around. In some cases it can't be pleasant for the man either, as he might not want to be obsessing over a particular woman but some magic bond compels him to do so. And what would happen if he was already in a committed relationship with someone he'd potentially known for years, maybe even had kids with; does the bond just override all those feelings? The fall-out of that wouldn't be pleasant for anyone.
Then there's how women accept the bond: presenting a mate with food. Does it have to be an intentional act? Or does it still apply even if the woman unthinkingly or unknowingly gives the bloke some food? Could you potentially trick someone into accepting the bond? And even if you accept the bond, it's clearly stated that there's no guarantee the couple will be happy (Rhysand's parents being a prime example). But even if they are miserable, does the bond compel them to stay together? Does the man remain incredibly possessive over the woman even as love turns to hatred? What would happen if she tried to leave? Even for happy couples, they basically become obsessed with each other, to the point they feel they can't live without each other; it's mentioned if one mate dies the other often doesn't want to go on, which sounds pretty depressing and unhealthily codependent.
After staging Nesta's forced intervention, Feyre informs her that not only are they evicting her from her apartment, they're tearing down the entire apartment complex to build a refuge. That's nice and all, but what happened to all the other residents there? Presumably they all got evicted too and it's never mentioned what became of them. Given that the apartment isn't in the best shape and is in a poorer part of Velaris, we can assume most or all of the residents are hard-off so they might struggle to find other accommodation. Plus there's the fact that their rulers can apparently throw them out and tear down their home on a whim, with no apparent laws in place to protect tenant rights etc. You also then start to wonder why Rhysand and the Inner Circle are apparently fine with some citizens of Velaris living in what they call a "slum" and don't try to resolve the issue such as by, say, building better apartments and so on?
Feyre's illiteracy. She came from a wealthy family that, for whatever reason, didn't bother to teach their youngest child to read, despite her sisters being about three years older. What's more she was twelve when they lost their fortune yet she still has the literacy of a pre-schooler. This is even more baffling since she's behind in reading, yet after a mere few weeks in the Night Court she's able to consume novels.
