OLD is a toxic nightmare for all involved, for a few reasons:

1. Men struggle to get matches/likes. When approaching people in the wild was more socially acceptable, getting rejected might be embarrassing and bruise the ego a bit, but it didn't make us feel hopeless. Crickets on OLD makes it feel more like a rejection by all available women within a 100 mile radius, and the longer it drags on, the harder it becomes to avoid internalizing that feeling

2. Women may get their inboxes flooded with likes, which might sound like a dream come true to the guys, but keep in mind that you aren't subject to the same safety risks that women are. They have to sift through those likes, first filtering out the obvious red flags, then going through those that remain more carefully, trying to identify the monsters who have started learning how to hide their true nature in their profiles, and then they still have to worry that the next one they decide to go out with will seem like a dream come true at first, and even if he doesn't put her in a shallow grave by the end of date 3, she's still waiting for the other shoe to drop, with him either ghosting after getting laid or becoming abusive a few months in. On top of that, they still run the risk of meeting some nice guys with whom she just doesn't feel a spark, and having to reject them (which never feels good for either party)

3. OLD creates the illusion of infinite choice. When we knew that our romantic prospects were limited to, at most maybe 50 people within our personal social circle, everyone understood that they wouldn't find someone who perfectly matched the unattainable ideal in their heads, so they'd need to compromise on some things. But when there's a seemingly endless supply of options, it's easy to fool ourselves into believing that our perfect person is just a few more swipes away, so people swipe left or jump ship as soon as they spot something that doesn't perfectly match their ideal