If all the "BAD" things were to happen at once, your brain would try and de-sensitize most of it, in an attempt to keep you sane. Say: 1000 bad things happen within a day. You would probably only interpret 10 of those events as bad and the other 990 as merely annoying. So, in effect, only 10 bad things will have occured in your life. This would appear to be the easier choice.
But ...but, is life supposed to be easy? Don't we need the "BAD" to weigh the "GOOD" against. If everything "bad" happens in one day, could we ever enjoy life again? All other subsequent events ....being good ...would become very mundane, without bad things to measure them against. Life would become very meaningless.
And, we also need to consider the overall picture. What we interpret as "BAD" can be a forerunner to "GOOD". Case in point:
I lost my job four years ago due to cut-backs. This was a "bad" time for me. But, the job I attained next introduced me to my current girlfriend--a very GOOD thing. Had I not lost that job, I would never have met Molly. In hindsight, I am very glad that I lost that job. I'm much happier with my life than before.
We also need to consider that we learn more through failure than success. Winning feels good, but it is losing that exposes ourselves TO ourselves. If all the failures happened in one moment, all we would learn is contained in that moment. We would blunder through the rest of our lives gaining no more insight. Again, life would become meaningless.
Nope, give me "bad" things in regular doses, if you please. I have a long time yet to ponder them.