hmmmm…
Yeah, not sure your anger is 100% valid here. xD
I get you though, it’s frustrating sometimes, but it usually also gets solved in the end.
Get some precautions setup like timeshift and a backup solution so if something happens in the future, you have simple ways out of it so you can retry whatever was happening. 
There is a ton of good stuff to learn from browsing Tutorials - Manjaro Linux Forum