You weren't supposed to open the case.
You weren't supposed to replace the battery.
Any internal wiring hacks were never to be exposed to the end user.
When it failed, you were supposed to replace the entire unit for additional Apple profit. Any observations based on doing exactly opposite what the designers intended are meaningless. Sorry.
BTW: I've despised all Apple interface choices from day 1, the original MAC, the iPod, and the iPhone. I spent quite a while trying, resetting my brain, making them my sole devices, etc. But I'm an outlier. I don't count. They work well for their target market.