To put it bluntly, Yes. The idea that the universe is something with a finite age complete with a starting point and ending like that of, say, Animals, plants, bacterium, comics, and books is not based in reality, even though is may seem that way to many. It is mathematically impossible to calculate what went on during and before the time of the "Big Bang". In addition, the idea that cosmic background radiation is all(or nearly all) from the big bang doesn't have any actual evidence to support it. Also, the idea of a "Big Crunch" is something I doubt, and I am not alone in doubting that. Some physicists are overtly skeptical of it ever happening for more reasons than one. Ditto for the Big freeze scenario.