Preston Garvey is always sending me to the same locations like the slog and finch farm and I'm getting repeated quests from the settlers. Will Garvey ever start giving me different and new locations eventually?

I think he gets stuck in a loop every so often. He will break out of it after a while, but that may require you to stay away from him for a few game days.

I have one 117 missions for the minute men.. preston.. they are looped from what I can tell doing so many.. its always the same 5 places.. and seems like they are always unhappy.. so if they fall below a certain number be sure youll get told another settlement needs our help....Ill mark it on your map...and another thing.. if you have time.. it seems kidnapping are all the rage in the commonwealth.. when you do a certain amount of saves from kidnapped victims.. you get a perk.. no one knows about it.. and I got it and was like.. where did that come from.. took me a bit to figure it out..