This is why you shouldn't overstay your welcome.
So they had killed Jax and I (Brand/Mid) off my Mid Tier 1 Turret. Got the Turret, then killed the other 3 off the Tier 2 turret, followed by taking the Tier 2 Turret. So they decided to try and take the Tier 3 turret with me and Jax respawning in a attempt to protect it.
They could of took their 5 kills and two mid turrets and backed with the lead they just took. Instead they over stayed their welcome.
This is a prime example, sometimes it's better to take what you got instead of trying to push for more. Sometimes this may of been the right call, but when most of your team is limping at the time, it's better to just leave.
