I'm a total nerd for Mario Kart, but life would be better if some courses ceased to exist. We all have some in mind. Courses that have personally victimized you. Courses that you will forever hold a grudge against for being so awful. Although my list may not be the same as everybody's, it's pretty easy to see which courses are completely psycho and just want you to get 12th place.
1. Rainbow Road
Rainbow Road...How do I begin to explain the devil of Mario Kart courses? Sure, it's pretty. But appearance isn't what matters here. If any course could physically plot against you and wish for you to fall into a black hole in space, it would be Rainbow Road. Anything that's thrown at you will probably knock you off if you're not falling off already. Even power-ups like the star or the mushroom will make you fall off because you'll go too fast for the course to handle. I do not trust anyone who enjoys this course. It's evil. Pure evil.
2. Moonview Highway
Another pretty course that's actually out to get you. Don't be fooled by its beautiful moonlit city appearance. It's just like driving in Times Square, only you're smaller than every car on the road and some of them want to blow you up. You've got big cars speeding past you everywhere you turn that really enjoy trying to hit you. Especially the ones with the STUPID BOMBS. Not only will they stall you a few seconds if you hit it, but it will also blow you up. Lovely, right? Wouldn't it be nice if we could deal with just the 11 other characters on the track who throw shells at us?
3. Grumble Volcano
This course has a mind of its own and does what it wants. It tricks you in the first lap, making you think it's all nice and easy and doesn't crumble beneath you to make you fall into lava. Not to mention there is lava spewing EVERYWHERE trying to kill you. I thought Mario Kart would be fun and not burn you alive.
4. Sherbet Land
This one is so simple but SO HARD. Probably because if conditions were ever like this in real life, we'd have a state of emergency and be told not to drive because the ice will make you smash into things that you normally wouldn't. Except in real life, you don't have penguins sliding on their bellies trying to bump into you. Only Mario Kart could make people hate penguins.
5. Mario Circuit 3
Ever wondered if a course can be bland and extra at the same time? Just look at Mario Circuit 3, the ugliest course in all of the Mario Kart kingdom. At least Rainbow Road is pretty. But with a course that ugly and bland, you would assume that it's boring and easy, right? Well, that's where you're wrong, my friend. Sharp twists and turns are fun when they're not 90 degree angles with pipes and oil spills around them. It's like it wants to corner you against yourself. If you wanted me to lose so bad, why not send random creatures to the course to pelt me with banana peels and turtle shells? Oh right, you did.
Honorable Mention: Yoshi Falls
This was the first track I ever tried on Mario Kart, probably because it is so BORING. This one clearly doesn't go out of its way to sabotage you because it's literally just a round track. I could drive this with a real car. I've driven on roads more dangerous than this. I could have even designed the track for this. Yawn.