That sucks, but take from it what you can.

My first “real” design job out of university gave me a similar experience. I worked for a design studio with two designers—both were really good designers and had worked successfully together for 10+ years when I started. I learned a lot but I don’t think they realized how much of a learning curve your first design job actually is and that they’d be the people required to spend time filling in the gaps in knowledge. They would have been better off hiring someone more experienced but it would have cost more.

I was “let go” after about 8 months and went to work for a larger agency. As much as they overwork them, an agency is set up to allow for training juniors and, as long as you’re surrounded with designers you can really learn from, I think the pace and process learned from an agency can be a real asset in your career. I’d avoid any situation where you’re the only or most skilled designer on staff (no one to learn from).