@greenWhale do the players also think it's boring, or do they like planning? If they agree, remind them they're meant to be dashing rogues who take risks, and failing can be fun. If they like planning, maybe it's not the right group for you
Some of my players overanalyze in combat. E.g. one dove into the rules & measuring squares to jump over a river. I told him that's like his PC checking the site with a tape measure during combat, and if he'd fallen in the river it would have been fun anyway