I'm single and been in my aforementioned large apartment with much larger terrace, I also have seen the bad relationships mostly shake out while the good relationships thrive. I don't have a way to quantify either, I just recall there was a shock at how
many domestic disputes and abused children there were, along with how many passive aggressive things must be happening to anyone else cohabiting.
I mostly just had to re-evaluate what level of exposure I was comfortable with. I was doing full complete reclusion for over two months and it was getting to me.
In the urban environment a few months in, enough people actually were receptive to in person dates because half of the population already went back to their at-risk parents and the other half wasn't going to, so our risk profile had some discretion. With enough information about the disease, after ensuring I wasn't an early adopter, my distancing technique expanded to just making sure my personal R0 is less than 1, as opposed to being actually worried I got it. So that just meant two weeks between encounters, routine tests, and select small groups of people.
I've since had great flings, and the biggest surprise was how many people I was able to get to come back to the city. People I didn't hit it off with before were going stir crazy at their parent's house or in whatever rural area they had retreated to. I have a good cadence now and with completely new dates I just ask them what their current distancing policy is.
But around early May it was definitely unsatisfactory. An absurd level of loneliness, and jealousy towards fulfilling relationships and thinking about the improbable poor luck to get here: I was involved with half a dozen women before lockdown, 2 left the city immediately, 2 got covid, 1's roommate got covid and sheltered in an area I couldn't reach while getting spooked, and 1 went full on recluse like me. Its been a wild ride on the dating scene since May for me, and it just requires a different level of discretion, testing, periods of not interacting with other people which is actually super easy for an ambivert leaning towards introvert like me. (interacting with other people definitely drains me, instead of adds energy to me)
Just adding some color to "the grass is greener", as well as what a sometimes-extroverted bachelors actually wants.