Ok, stop right there! First off, it will get better with practice, it just takes time. Secondly, for the type of problem you're describing, you need to slow down and concentrate on a really easy chord (like Dmaj) and perfect it, then move on. If you try to learn 4 or 5 chords along with strumming patterns and timing before you have the chords down, you're going to get frustrated. Every time you learn a new chord, first, understand the shape (ie, where your fingers are supposed to go) and fret the chord without strumming any strings... only when you think you've got your fingers in the right position should then slowly strum through the strings... go so slowly that you can hear each individual string. If one of the notes sounds off, like you're getting fret buzz or a finger is touching a string, then focus on fixing that and then start over. When you can play the chord so each note sounds cleanly, you've got the chord down. It may seem sometimes that its faster to practice speed and quick chord changes first, and worry about getting the chord "perfect" later... but this is not true. You will have to "unlearn" your clunky chord changes later, and that will take a lot longer. Just practice slowly, making sure you have the chord sounding completely clean, and then you'll speed up in no time.

For a quick reward, if you have an acoustic, try playing around and experimenting with open strings combined with just one or two fretted notes... you'd be surprised at some of the cool sounding stuff you can come up with using just one or two fingers and two or three strings. Even better, get a capo, and you'll open up the possibilities even more. I have the Planet Waves NS Pro capo, and its great. Just stick on the 3rd or 4th fret or whatever, and experiment. Also if you have an acoustic, remember you can always work on finger-picking patterns and take a break from learning chords.