I am so over this Quest

I’m doing the Combined Forces quest, got to where you have to close the Valve B or whatever and I’ve done all that and I got so close where I got 3/4 of those pipes that shoot out fire? And I had killed literally everyone but two soldiers and one Pyro AMP And then I got one shot and I was respawned right back at the shoot the gas valves. I’ve done this quest over and over over the last three days and I’m so over it.

Is there something I can do? Like something in settings where I can respawn past that or is it a game thing?