I've never quite seen a repair history like this! Does your MacBook get crushed inside of bag/backpack often? Subject to unusually high temperatures, cold, or sunlight? Any weird power issues at your home? Very curious :D Thule's Gauntlet cases are great but in your case, maybe a Pelican laptop box could work too.
I always use a soft case when I put it in my backpack for extra protection. Heat might be an issue though, especially if the laptop is hot and goes into my backpack directly.
Maybe I should consider a Pelican case now that my APP has expired... and maybe install some fans as well...