I personally found this enjoyable to play. Partly due to the absurdity of it all, but there were no real errors with it. I apply the same standards for joke maps that I apply to every other map. This map is in no way, shape, or form perfect or appealing to the entire masses (like every map), but it adds a tad more variety to the database.
Of course it could've been better, almost every single map can be improved. The fact of the matter is that this is rankable but doesn't meet your expectations. Sometimes that happens.
Besides, it works with the source material. I hate bringing up the "other things are worse so it's ok" argument, myself, but it does apply here. If you think you can honestly come up with a better map than what they've got down, you go do it. I thought it worked well for the source material without getting ridiculously stupid. Excuse me for having an opinion that isn't the same as yours.
In all honesty, I like this map the way it is. It's a bit derivative in its execution, but it works for this, creating a dichotomy of something we're familiar with playing with something most are definitely not used to hearing. I still applied my standard protocol to modding this map, and sure, it might be the lowest-rated map, but it's still rankable.