Am I just really bad at this or is the boss battle just suuuper hard? I can't get past Marzia being released. The zombies, plus lasers, plus the fast missiles from 1-3 sources, I can barely kill a single zombie before dying which means I can't get the g-fuel drops. ONCE I defeated the first batch of zombies, but that's as far as I can get. I've done this at least 20 times now, prob more. I wish the game would make it get easier after you fail a certain amount of times... like double health to start with on attempt 11 lol since obviously I am incapable.

IT IS SOOO HARD. I haven't beaten it yet.... 

I finally beat it. I do think it's too hard. There's too much going on and your not-a-flame-thrower ammo doesn't reset at death.

I just beat the game. I have never felt so satisfied. That took so long.