Sorry to be replying to this 3 days late, mate, but I've only just read it. I think what you've described is a not uncommon way to look on things, so you're by no means the only one. FWIW, years ago I came to the realisation that everything ends - so just as the good times end, so do the bad times, and the circle comes around again, and life kind of works in this endless loop. That may does sound hopelessly cliched, but I know it made me approach things differently. All the best.
I just need a period of relative normality. Since 2017 I've been dealing in extremes.
October 2017: Got together with my girlfriend, after leaving a marriage I'd been unhappy in for years. 4 weeks later break my pelvis in 3 places and the ex lawyers up big time
May 2018: Really amazing holiday and racing trip to Italy, some nice writing work comes up. June, the ex unleashes hell on me for some medical Bills I didn't know existed. Debt collectors, the works.
August 2018: Divorce agreement settled but I get screwed on account of her lawyer and mine being mates. Finish a crazy 2 week mountain bike race, get fired a week later.
February 2019: writing work looks to he going ok. Start a band. Get sued by ex for unpaid maintenance that she agreed didn't have to be paid until I had a job.
May 2019: take crappy job I hate to pay the ex off.
I wont bore you with everything else. But I just got a decent sized tax refund that meant I was able to get everything back in good shape and treat myself a little bit after 2 years of craziness... so my mind is now searching for the next crisis.
Its crap not enjoying the good stuff because you're just convinced the next time the phone rings or the door goes bad stuff is coming.