You say that you don't blame religions for anything (earlier comment) but here you say the bad can outweigh the good (the vice-versa), and which is my quibble with some religions - that they can and do indeed cause more problems than they solve - by holding up any progress that might be beneficial for humans, or simply causing division, for example. As I see such of course. But weighing up the goods and bads is not so easy of course, and especially over time.If people want to get rid of religion because they think is bad, but yet it also does things that are actually good, unless they come up with a replacement, you lose the bad and the good. Sometimes the good out-weighs the bad and vise-versa.
How come so many can live without religions but others apparently not? Perhaps because these latter are not so free-thinking and/or educated enough to choose the without option. Perhaps, just saying.
Overall, I don't know if we would be better off without religions, but I think few would dispute that some peoples certainly would be better off if religious influences weren't such as to restrict the freedoms and expectations that we all mostly take for granted these days - the Taliban being one extreme example of such.