When someone ruins a 1v1.

Have you ever had someone ruin a 1v1? Let's say Shen and Garen are 1v1ing, both are low. When one goes in the enemies jungler, lets say ults in and kills you (this is can be your ally instead.) So basically, most of the time someone asks for a 1v1 is when one team is winning by so much. If you are the one winning and this happens to you its normally the whole team the kills you instead if you ahead. But when the fed Jungler or someone ruins a 1v1 then spams...ITS A TEAM GAME....is dumb. I mean you already are going to win the game. So its either you want to boost your kda....which makes no sense why you focus 1 player instead of the other 4.......or that person that ruins the 1v1 doesn't have faith in their skill to end the game. Most likely the 2nd one....