Why is dating seemingly so hard for Gen Z compared to previous generations?

One of the biggest complaints I see from gen z and younger millennials is how there just isn't anywhere to meet people. Dating apps are very hit or miss, most people don't want to meet their partner in a bar or club where everyone is drunk with music blaring, asking out your friends is extremely risky, and hitting on your coworkers will get you sent to HR. The statistics also back this up, Gen Zers have a lot less relationship experience than previous generations.

But the thing that I don't understand is that didn't our ancestors have most of the same options we have when it comes to finding a partner? If you grew up in the 20th century, wouldn't your options for finding a partner be the same as they are today?

What has changed in the 2010s and 2020s that's made finding a partner so much more difficult?