While you're right, it's definitely not Silicon Valley in terms of the kind of network that exists, you're comparing apples and oranges. The startup scene is vibrant. There are tech meetups with hundreds of monthly attendees. There are active groups for all stages of business, from ideas over beers to celebrating series A to burning through buyouts on starting new ideas.
I think you should be less frustrated at your eventual return to the Cincy area to hopeful and even excited. There are great opportunities here for all types of startups, and it's still small-ish enough that you get that midwest, hometown, half your network has a startup in some stage, feeling that you will never get in a large market.
That is, until we become a large market.