I think you do not value what you have. A few generations ago this would be called heaven. Familiarity with this and our emotional poverty means we disown this privilege and demand more attention of how unfair our lot is. In heaven we would do the same......which calls into question do we know the Kingdom at all?
By the way I am full of self pity too much as well.
We may have somethings here that might have been called heaven before (electricity, washing machines, running tap water, machine sewn clothes, airplanes, etc), and many people may be not so bad off having a certain amount of things (wifes/husbands, jobs, cars, houses, health, etc), and it is true they are not grateful for what they have, but many/some people have little or nothing. The 7th church of Laodicea is abit like this where they are rich but there is implied to also be naked and poor too. I have no wife, no family, no children, no own unattached house, no car, no job, not really any friends, no quiet (ringing sound all the time and some other things), no clean water/food (fluoridated, sprayed), no mental health allegedly, no recognition/credit for my hard work discoveries in my studies, not been able to get out much for years, no good "location", been hard to have faith, etc. Its been more like Hell than heaven for me. Many other people may not be so bad off but even they have alot of bad things like fluoridated water, housing crisis problems, low wages (having to "work for the bank", "live to work", always too busy and have no time), surveilance everywhere, etc. So its not really a Utopia or Heaven except for for the "elite". Though for myself I am having faith that God/Jesus will fix the worst things I've been suffering.
I don't think a secular world One World Govt is Biblical, but it may be a corrupt fake copy analogy of a true Biblical world Kingdom. Humans have been trying to find their own answers to conflicts of races/nations, genders, religions, classes, etc which have resulted from the Fall and Babel. Babylon rides the Beast in Revelation. Only true unity and diversity and "as above so below" can be with/in God/Jesus (minus the evil).