The author says that smartphones suck because battery life limitations mean you cannot use the full power of the phone's components. Librem admits that they are aiming for a mere one day of use before you have to charge the phone's battery, which is shorter than many Android devices these days. Therefore, even the Librem phone may disappoint the author of this article.
That's a pretty obscure reason to say that smartphones suck though. If you need more computing power, buy a tablet or a big battery pack, or use a laptop. Hell, log into a remote server and run your apps there.
95% of people who use phones don't need that much power and given how many people own phones they clearly find them extremely useful.
The battery limitation is pretty much inherent to portable devices. I took liberty to interpret the article as "how could smartphones be better". If the point is literally "smartphones suck", then I guess, okay, they do. Case closed, we all can go home now.
I don't see the problem. Phones often run at full (thermal) limits when they have an external power source. So, just connect an external battery pack if you want your phone to go faster.
