You have this turned around. B6 sold the ticket because the connection is doable. In air carrier speak, it is within Minimum Connection Time (MCT). Whether it is within SCT (Sensible Connection Time) is up to each individual and his own risk tolerance. Personally, I would never book such a connection. Given that there is only limited service MCO-MBJ, you are essentially out of luck if you misconnect.

Not to berate you, but because this is a public board and your issue arises regularly in other contexts, the time to check connection times and whether you are comfortable with them is prior to booking. If you are within 24 hours of booking, I would cancel and rebook as below (or on another carrier or connecting elsewhere).

If you are insistent on flying on B6, I would book this as BDL-MCO on the last flight the night before, spend the night at an MCO property such as the Hyatt (connected to the terminal) and then head out on the MBJ the next morning.