I got this game for free and I enjoyed playing through the campaign with a team of semi-competent bots because I enjoy the setting and I think the gameplay is decent, but I see little reason to recommend Vermintide 1 over the sequel when that's a more fleshed out experience and has a lot more concurrent players.
Also, even matches with bots require an internet connection for some reason so "owning" this game isn't even worth it for preservation purposes.