Concussion? What on earth have you been up to dude? Seriously, look after that - can be nasty.
Can understand the frustration, but try to keep perspective. Like you, I've had old, simple vehicles that just keep going and going (or so it seems). But when you sit them next to a pristine example, you realise how bad they've gotten
Now, siddown and look after your squash. You only get one and they don't grow back!