I agree with you. But I might find it a little more worse than you - I'm sorry if I'm too harsh, but I think it looks way too rushed. The first coaster seems rather unrealistic to me and the building is not so good, to say it in a gentle way. To make park more realistic, you should start building smaller stuff in the beginning and then, as the park grows larger, build coasters in that size.
As it is now, the too huge and pretty high coasters a little out of place.
Concerning the buildings you should try the make some more details on them...
Hope this can make the park look nicer; and increase your skills
Sry, I have had this game for 10 months, still a begginer, But I did get to go to California's Great America this summer. Please don't be TOO harsh, constructive criticsm is nice though.