He's a complete fanboy that doesn't know what he's talking about.
I have the M1 Mac, and it's by far the worst experience I've ever had on a computer.
Do you know how cumbersome it is checking to see how much data MacOS writes to your SSD daily? At one point, it was writing 100+ GB of data to the SSD daily. It is very frustrating and something I never had to do with Windows.
The M1 Mac also has performance issues with web browsing, something that an "inferior" Windows PC with i5-8400 and GTX 1050 ti can do with ease at 3440 x 1440p @ 144 hz. Scrolling through any website that has some moving graphical elementals turns into a laggy mess.
Have a look at this video. It perfectly captures the performance difference between a Mac and a Windows PC:
TechLead is also known for telling it like it is and holding no fanboy biases. He doesn't care who he's pissing off whereas other tech YouTubers need to be gentle when they're reviewing Apple products otherwise they would face backlash from their Apple fanboy audience. That's why you can never trust iJustine, Marques and other pro-Apple YouTubers.