.....

Well, not everyone is capable of surviving in an apocalypse. Most of the population died in many zombies scenarios, and the MC is happened to be a character that tends to avoid zombie and relying on people. Can't blame him for that, because if I put myself in a zombie apocalypse scenario, I think I would immediately die when shit hits the fan. Maybe you are the kind of people that can survive so that's why you see him as a pathetic person, but most people ain't used to that stuff you know.

He has literally gotten several other people dead because he’s a liability. I don’t mind weakness but he’s so weak he holds everyone back. That’s the problem.

Well yeah the people that's with him surely knew that too, so they know the risk of being with him. If they really don't want him to hold them back, then they would leave him. They allowed him to be with them meaning they're ready to take the risk. And again, not everyone is prepared for the apocalypse, so someone like him is bound to exist. Someone that only relies on luck and other people. Sometimes it can make story interesting, since if all the characters are good fighter, they won't face any problem which can probably make the story rather dull. I'm not saying it's entirely impossible to make an interesting story like that, but more characters that can cause difficulties here and there can provide good plot in a story.