My 2006 Ford Focus ate its own spark plugs at 78k miles

I bought this car used back in 2019 thinking it would be a cheap commuter. Last month on the highway it started misfiring hard and nearly left me stranded. Turns out Ford designed the cylinder head so the spark plug threads are super shallow and they just strip out over time. My mechanic showed me one plug that literally blew out of the head and took the coil pack with it. Three of four plugs were loose and two had damaged threads. Has anyone else dealt with the whole thread repair kit route or did you just swap the head?

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