I cried. That's not saying much now that I'm a middle aged dad with 4 daughters, but it was touching and sad, and they did a great job of weaving it into the storyline with his letter to Joel.
I'm sure there are some 4chan incels organizing a negative review campaign as we speak.
I've been surprised how good all three episodes were, but that one was really great. As a fan of a wide range of apocalyptic stuff the "only man on earth" scenes are always interesting to me and Ep3 was one of the best takes. The old Twilight Zone where the guy just uses alone time to read, the quirky The Last Man on Earth with Will Forte, The Road, I am Legend, etc...
I was laughing at how triggered it might make some that the guy's survivalist lifestyle was a facade. The back and forth about his paranoia over the government being nazis and how they actually are nazis "but not back then"...that particular scene was perfect. They're both right.
In a lot of these apocalypse shows the comics and books do a better job of getting into the details of the world and atmosphere, but so far this show is nailing the details of the setting. I think that was a big part of Game of Thrones success, it wasn't afraid to get into tiny details of the rich world. Made it hard to follow for some but I think it was part of the success formula.
At first I thought it wouldn't be that big a difference if a zombie plague is transmitted by fungus vs virus, but being able to SEE the infection is shockingly gross/scary/cool.