I can't remember how or exactly when I came across Alex but it was several years ago. On the one hand I find parts of him highly relatable (eg "learning his lines" and his aversion to asking others to climb with him) and others not (eg I have zero inclination to climb anything).
I certainly respect how much work and preparation he puts into his climbs.
The question is: how is he different to the Everest glory hounds that I personally find objectionable? These are the people who basically pay $50k to "climb" Everest and largely get carried by the sherpas. Ask an experienced tour operator and, weather depending, they'll tell you they can probably get anyone to the top.
There are some key differences:
1. I honestly think the Everest glory hounds aren't doing it for the experience, for the most part. They're doing it for the bragging rights. It's the next level of Instagram flexing. Like it's the same people who go to Greece and the only thing they do is get a selfie at sunset in Santorini before moving on to the next Instagram stop.
2. Alex is actually doing things that have never been done before and some thought impossible.
You may view what Alex does as unsafe (I mean, I'd never do it) but it really is his life. Where my attitude turns is when someone has children. You see these stories all the time of [amateur climber] pursues life long dream of summitting Everest and dies leaving [wife and 3 small children].
The defenders will say that person is following their dreams and teaching their kids to do the same. Me? It's purely self-indulgent rationalization. If you're a parent, your kids need you more than you need to be the 6000th person to summit Everest.
Alex has a partner. She can make her own choices though. But your kids? They don't get a choice.