I've had some really good years... Where, yes, there were major stressors, but they came at "good" times, and were handled well. By "good" I don't really have a solid description... Because sometimes that means they were back to back to back, which made them very easily rolled up in the other stressors that were going on (coping mechanisms in full swing, and damage control liberally applied); and sometimes that means they were spaced out in such a way that my life easily absorbed the blow, and recovered, long before the next one hit.
And I've had bad years, where the stressors just kept knocking me over like waves, and then once my feet were out from under me? Rolled me. So thing went from bad to really bad to holy f*cking shit. They weren't necessarilly harder/worse stressors. It was more commonly a combo of bad timing & my life not being able to absorb the blow and recover.
In a lot of ways? It's like being punched. If my muscles were hard then it would barely affect me. If I was soft? I'd be bent over puking and gasping like a fish, flailing around half blind. So sometimes I could shrug off a single blow, or even repeated blows, and no worries. And other times, the first punch takes me out, or sets the stage for me to be completely defenseless against the next series of them. I'd love to use this to blame myself for not being strong enough, except it doesn't matter how fit you are if someone punches you in your sleep, or if you happen to be sick as hell, or just unlucky? Blow lands wrong? Goodnight Irene. Much like life.
Most of the people I know? Go through at least a few major stressors a year. Sometimes more, sometimes less. Some years have fewer, some have more. Some are harder or easier to deal with. I don't know anyone -well- who doesn't have at least a few major stressors a year. (Although I know a lot of people not well enough to be told about the hard things going on in their lives. Which, I think, is a mistake a lot of people make, in comparing themselves against other people. The whole "never judge your insides by someone else's outsides"... Has a lot to do with being privy to all the facts.)