There are other schools that meet full-need for international students- they are just need aware, but your odds may still be higher. MIT, for example, is harder to get into as a transfer than as a first year.
Your reason for leaving- that you haven’t found people to do hackathons with you and that your school hasn’t come up with co-ops for you- are not compelling. The people who transfer to a Harvard or an MIT are the sort who make those things happen.