You were already denied admission to Williams. I’m not sure applying as a transfer (where the rates are extremely low in terms of acceptance) is worth your time. As a transfer after only one year of college, your high school record will again be used to review your admission application. But perhaps others will weigh in.
If you are not willing to give your current college a chance, perhaps you can look at some less selective colleges that have similar qualities to Williams.
Do not drop out of your current college to go to a community college. Do the very best you can at this school…and try to seek out reasons to stay there and get your degree. Get involved in some clubs and activities.