I'm not saying your opinion is wrong or anything, just gonna explain a few things that may, at least, take a shot a changing a few opinions here and there...
A) This level is very difficult and tested multiple times, I assure you. Thank you for your opinion, don't take it personally...
B) The Clown Cruiser is there especially for passing the lakitus. If you didn't know, you can use it to crash into what they throw/the actual lakitu. Just a recommendation!

C) This is a spin jump challenge, making the use of the volcano lotuses obvious...you can bounce off of them and there is a way to pass them all without getting hit once.
D) The cutoff is meant to confuse the player so they think that the game is over, even though it honestly isn't.
E) The bullet bills are set up in a way where it seems random, but is definitely tested and actually made in a way where the jumps are very hard to make.
F) The Yoshi gives an extra hit so the extra-risky, epic players can have a reward for being good players!
G) What is DEFINITELY random is what the lakitus throw.
H) This is a prototype, so expect future changes to the level! Thank you for your feedback and I'll be sure to make quite a few edits! X*
Once again, don't take this the wrong way, I'm not raging or anything about the terribly low score, but I just thought I'd give a few reasons why I slightly disagree. Then again, you're a level judge, so I'll just go ahead with what you've stated.
Finally, thank you for your judgment! (Hey, at least it's not as bad as every single 3D Sonic Game ;])