Although I'm not one, but growing up in a Buddhist family has partly influenced how I see life and sufferings. Throughout our lives (excluding only when we are suicidal), life is about balancing between sufferings and happiness. When we are suicidal, life is about balancing between sufferings and the resources we have to cope with them. So essentially, regardless of which situation you are in, life is about balancing sufferings and something else. Therefore, sufferings are really a part of life that will always be there.
The second question, I think consciousness varies from one person to another. We were all born at the same starting point. However, right from the VERY FIRST second, our lives all branch into different ways. And these ways: the environment, the people, the upbringing, etc. and the surroundings essentially, influence how we view the world. Because of that, that will affect our sensitivity levels to pains.
People say we shouldn't compare our happinesses with others', and based on that logics, we also shouldn't compare our sufferings with others', because we all view life differently, and our tolerance levels with bs from life are also different. That's why it's always important to remind ourselves and others that our best is good enough.
And that's why we can NEVER understand someone else's situation, we can only SYMPATHISE with them.