im not sure that's the best way to think about it im not saying never give up on a lane, but try ganking like twice, and if they still feed or they aren't following up* then give up on it. focus on another lane. if someone takes a camp and fucks up your route, tell them. ask them to ask first, most people will. as for warding your non started camp sometimes you have to remind them (although i don't know many people that don't already :/), such is the life of a jungle.
you can not gank a feeding lane, just dont give up if they fuck up early, then you allow the enemy to snowball, and no one wants that. give them a chance, and if they show that they aren't gankable then focus on getting mid/bot/top fed. whatever you have to do to win
*ping, jesus fucking christ ping and make sure that both of you are ready for it