I am happy with uMatrix, too, but FWIW, I could not recommend it to non-technical or impatient people. For many pages, I require multiple iterations of stepwise refining of what is and is not allowed before a site works for me.
I do not mind, but I can imagine it easily gets annoying for many people rather quickly. (OTOH, those people would not care to set up Pi-hole, either.)
I would rather spend some time setting up a solution with minimal maintenance than constantly be adjusting and tweaking my solution to get things to work just to browse the web. I use uBo because I rarely have to go in an tweak something and it's mostly just a temporary pause on blocking. A pi-hole might be nice but I like how plugins actually remove the spot where the ad once was so the site looks less like swiss cheese.
I do not mind, but I can imagine it easily gets annoying for many people rather quickly. (OTOH, those people would not care to set up Pi-hole, either.)