@VirtualHugsAllRound I am sorry you feel shit, and I get that being single/living alone has got to be a bit lonely and isolating. 
But many others would probably swap places with you. As has been said, especially people stuck with verbally and physically abusive partners, people in dead or miserable marriages, and people with 2 school-age children or more (people with one seem to be coping reasonably well IME, but the ones with more than that are struggling, especially as they are having to home-school them!)
Me and DH are fortunate that we have each other, he has been written off with 80% pay, (and my job is a work-from-home one anyway,) and our adult DC have left home and living with partners. And we live in a big plot with quite a bit of land, and a lot of fields and woodland around us, so we can get out for some decent walks.
I feel quite sorry for certain people though. All of the above I mentioned - and single people too.
(((HUGS))) to everyone who is suffering in any way. 
That said, there is an upside to this for some, as it's a great excuse to not see people you don't like, or who are hard work and demanding... My neighbour just told me (over the garden fence, from 16 feet away,) that it's Heaven not having to see her mother-in-law and her DH's brother and his wife and 3 kids. 'A whole month - virtually - without the family from hell....' she said. 
And I think lots of people who have a partner who have a friend (or friends) they don't like, are relieved that they (and in some cases their partners,) are not going to be hanging around. Also, you're not getting people 'popping in unannounced' (or even popping in announced!) because they can't!
So yeah it is an introvert's paradise right now. (But the downside is that it can be very lonely for some...)