Why does everything contain sugar in it?

I decided to go sugar free for this whole year after a few failed attempts this year and I truly realized how much sugar there is around us and in the food we consumed. It may be common knowledge but I was personally starstruck when I read a few labels and saw that most savory baked goods still contain sugar. Also sliced bread was a bit of a shocker as well but more so expected. Do you guys avoid sugar 100% or do you tolerate it in small amounts?