Agonizing over what might happen to a car, is in and of itself, a need for a therapist. To put it as briefly as possible, **** happens. I've totaled two cars because of low blood sugar. That won't happen any more because I have a Dexcom. What the Dexcom won't prevent is another idiotic driver intersecting with me. There are 250 million of them in this country. Defensive driving helps. It won't put shields around your car. Cars are fragile. Sometimes, they die. You can't prevent it.I feel your pain because I've been there. My original 2008 Brazen GXP (the namesake of my username) was totaled by another driver's gross carelessness. I'd had it three years and a few months - it was babied and cherished. To use your wording, it truly felt like a nightmare; I actually had recurring nightmares about it for the better part of eight years. And even though I moved on and bought another car, it never provided quite the same feeling as what my Solstice gave me. I did manage to snag a few keepsakes from mine when I went to bid it farewell: my rear windscreen, a set of keys, and my short radio antenna.
Long story short, I finally bought a practically identical GXP this summer and now all is well. The nightmares are gone.
If you have the means, get another whenever the time is right! Life is too short to drive boring cars.