Bad books, bad movies, bad food, bad sex. Surprised, seriously?
It usually sucks the first time mate, go watch some how-to's if you catch my drift, you'll likely improve with age. And thus it will 'feel better'. If you're both new to it, it's going to be so-so at best.
If not, congrats you're 2% of the aesexual population, join the club and pull up a chair.
I have eaten all the popcorn, I left none for anyone else.
first time sucks for everyone cause of expectations, you will find partners where it will be awesome and some where it will be boring af
Random party sex is normally quite crap, yes. Try it eventually with someone you actually like and you'll notice a stark difference.
The first (and most likely second and third) time sucks for everyone. Don't worry, you'll get the hang of it.
If you're disappointed with sex, then there is an issue with it somewhere. Either your communication is poor, you (or them) aren't invested in the act, or one or both of you are simply unskilled at sex.