A lot of it is that when you drive a 2nd level team car - the budget is smaller and the staff & bits used are cheaper than the level 1 teams. When MW moved to the Jag team my first thought was oh dear the cars would not finish may races and so it was. Looked great in green but unreliable.
You can't be unlucky like that for that long. He must drive in a unfriendly way, hey if you get enough intense anger up you can seemily blow lightbulbs just switching the light on in you house. Who ever blew a light blub while in a good mood not me!. I think it's the same theory in driving a car, he needs to relax out a bit more and then the car wont break, Look at Brock! only his co drivers used to break the car