4th set of lower control arms at 108,000 miles

[Rdsrds123]

I'd like to hear an explanation for this. Yes, I drive in a big city downtown, whose government is envious of the roads in Haiti. But, 7 total control arms??? I am a slow and careful driver. I don't try to hit potholes. My front brake pads have 108,000 miles on them with 25k miles left. Yes, it is a stick shift. If I was racing around, those pads would have been changed a couple times by now, at least. By not racing around, and by following traffic rules, these parts should last longer. I would like to hear a reasonable explanation. Truth is stranger than fiction, and unreasonable explanations probably make for a realistic explanation.