思ったのと違ったって英語でなんて言うの？

to drop out (of school) - this means that you leave school early without getting your degree (Something) didn't live up to my expectations. - This means that something disappointed you. It wasn't as it seemed. e.g. When I finally met up with my online date in person, he didn't live up to my expectations. I think he was just more interesting by text, and to be honest, I didn't feel a spark.

If something is 'not as expected' it means that it was quite different to your prediction, or perhaps, at the same time, it was either much worse or much better than you thought it would be. In this context however, it is clear that it has been a negative experience. If something is a disappointment to you, it means it did not 'live up to your expectations' or more simply, was not as good as you thought it would be.

When you leave college without completing the qualification, that is called "discontinuation of studies" or "dropping out". So when you want to explain that you discontinued your studies because it was different from what you thought it would be, you can say: -I dropped out of college because it wasn't for me. -I dropped out of college because it was not what I really wanted to do. -I discontinued my studies in college because it was not for me

*I dropped out of college because it was not what I expected. This means that you had your own expectations and when you started going to college, things were so different you had to quit. *I quit college because it was not what I thought it would be. To quit means to leave a place usually permanently. This means that you will never go back to college because of the bad experience you had.

So, initially you had a wonderful picture of college life in your mind, but, when you got there, you found that it was not as rosy as you thought it would be. Probably the picture you initially had of college was a place where you would find nice lecturers, easy to learn subjects, nice fellow students, but, instead, the environment was totally different from that. If you faced such a predicament and dropped out of college as a result, you may say: I dropped out of college because it was completely different from what I thought it would be like. or I left college because it was completely different from the picture I initially had of it in my mind.

We say "It wasn't what I expected" when something is different from what you thought it would be. This can be for anything: a movie, food, an experience like a vacation or even university. When you quit something we say "quit", "give up" or "stop" but with university or college (or school in general) we say "drop out of". When you think something will be better than it actually is you can find yourself disappointed, you can say "it disappointed me" to describe your feeling about it. It is also common to hear "It didn't meet my expectations", which means your expectations were better or more positive than how good the experience really was. I would say "I dropped out of college because it didn't meet my expectations"