Go to YouTube.
I think it's a good idea to head to youtube - there, no one will question the intentions of your animation and will just be happy to see familar faces from a video game... no matter how they look.
You established the AI are retards in your first animation, so you accomplished nothing new really humour-wise with this one. Apart from that, we have a couple of toilet humour jokes and an out of place Rocky Horror parody. What is the tie in with Left 4 Dead by the way? How was that clever? Very clever of you I guess to know that combining two popular things together might allow most people to look past the sub-par animations/drawings, haha. The scene itself was far too dragged out and might have been acceptable if it had ended with the explosion, however cliché'd that was.
The animation and ESPECIALLY the drawings seemed worse in this one compared to the original "Left4LOL". I remember them being OK in the last one, but some of the backgrounds and character drawings in the Rocky Horror scene looked as if a 10 year old had just discovered the rectangle tool in paint. The artwork towards the end suggests you yourself got sick of the parody by then and just wanted to end it. Your drawings for "The Lady's Room" were better than this, and that was 2 years ago, so why has the quality declined?
Enough of the review for the animation though, everyone has said what needs to be said about it. I really want to ask though, about the "...but I need to leave now or I might end up just repeating the same toons over and over again" comment.
I noticed you wrote this as a responce to someone...
"Newgrounds will forever love its poop humor, sex jokes, animated penis's, and madness. That's fine because that's what Newgrounds loves, and there's nothing wrong with it."
Seriously? What about "Gretel and Hansel"? "Tarboy"? "Bitey of Brackenwood" to name just a few? Don't blame Newgrounds for unoriginality - that is fault of the author. The only thing YouTube will do is lower your standards of what people find an acceptable quality of artwork and humour, as no one there will take the time to review your stuff properly.
I get this feeling however that you're only after "lol dat wuz cool" comments. Looking at past animations of yours, it seems you just attack people that offer criticism. I know some people can be "dicks" when they offer criticism, but it's up to the author to accept that not everyone will enjoy their work and to improve it for a wider audience by listening to such reviews. I would have thought that a 20 something year old would have learnt how to deal with the trvial task of responding to NG reviews maturely?
I was happy to read however that you have intentions of moving into darker territory with your animation. Let's be fair, video game parodies are just overdone. I can't even bring myself to watch my old animations from 4/5 years ago as I find it far too cringy to think that I found that funny at the time. If I were to pick up flash again, I'd like to think I'd animate in a similar territiory. It's different and can be enjoyable/acceptable to use those great horror movie clichés. Maybe I'll catch some of this stuff on YouTube one day.
I'll finish with a quote. You may recognise where it's from and I think it can be quite safely applied to yourself now with your attitude about Newgrounds. I might take the same advice too looking at the length of this review...
"I'm not sure how far you have your head up your ass but at this point I am sure that it's managed to pop back between your shoulders... So take your ass out of here and go back to your ego and sit sit in your room, stroking it."