To your first point, yes the future of the universe is not a happy one. As space expands it will rip everything apart, even atoms, current thinking has the universe a cold dark totally void place in a few million trillion years. Space has expanded to the point where not even atoms can exist. A great big never ending nothing. Personally I do not think we know enough about the nature of space-time, matter or energy to say with any certainty what the future of the universe is. In fact I am pretty sure we do not even know what the universe really is. Since most of it (dark energy, dark matter) is unobservable to us assuming dark energy/matter do in fact exist.
To your second point, no one knows since our big bang created our space-time and it not thought to be possible to observe another space time even if one existed. So maybe there was just one big bang or maybe there is a never ending series of big bangs. Right now we don't know and finding out if other big bangs happen will not be an easy thing to do. There is much to learn yet.
the future of the universe is not a happy one. As space expands it will rip everything apart, even atoms, What is the basis for that? What can rip atoms, stars and everything else, apart is their entering a black hole. There is no evidence that I know of that suggests space expansion will or could at some eventual point rip objects apart.