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Brommers
SRAM doubletap, as mentioned it's a replaceable hanger that's broken, designed to break so that the frame is less likely to do so because derailleurs are big hangy down things and prone to getting damaged. I'd guess it happened because the lower limit screw wasn't properly adjusted or you'd bent the hanger without noticing and it's gone into the spokes, possibly both. It happens quite often. Front not shifting down is a separate issue and probably a poorly set up front mech.