Not hard to read the lines here at AN who seems to be at a good place in life, and those who constantly is drawn to negative threads, and think they know something about one group of people, and how their life is.
I genuinely believe people can be happy in marriage or in relationships, since I see my friends and family who are happy, I also believe the opposite, but for most sane people with resources, manage to make necessary changes to.be happy.
I also believe people can be happy single, but what I often se, and especially men aged 50 and above, they do not live an healthy life, and certainly have a hard time to socialize with people in healthy relationships, and keeps friends who always complain about their wife or partner close for some reasons.
Anyway, important to realize, everything isn't black and white, and it comes down to you, who you are, and how you manage to be in relationships as well social smart to find the right person for you.