My VAG ones I just replaced (that were on for 10 months) covered 8000 miles, had broken down in my dizzy

AGAIN!!!

so I needed to swap my dizzy cos of it, it's weird.
As were the leads were black inside, but fine on the spark plugs, the dizzy connections are burnt!?!
WHAT THE HELL IS GOING ON WITH MY CAR???
as cheaper leads seem to last 12months longer??