I dunno think any of this makes you an asshole, just a poor planner. It's a really bad idea to quit a job without having something else lined up, if you don't have the funding to live unemployed for a while.
No, I guess you're not an asshole, but I can't argue against this having been a terrible plan. I would like to ask though, is the 3 month notice period yours or your employers? Because if it's theirs, I can't imagine that's legally enforceable in the US.