Don’t take it so literally. Every 32-bit device is a piece of garbage if fully updated. Just a lag fest. The iPad 2 on iOS 9, the iPad Mini 1 on iOS 9, and equivalent iPhones.
Fully updated 64-bit devices, by the end of their lifespan, have seen battery life reductions of 60-70%. Newer devices like the Xʀ and Xs have seen better numbers, but still poor vs iOS 12. Likewise with the 2018 iPad Pro.
This is all avoidable by staying behind. No empathy with those affected by the final iOS update. You brought this on yourself, most with years on end of iOS experience.