Ride it out. I had one bean look like absolute garbage. I was gonna give up on it and cut my loss. A friend told me to keep it going. It’s now in week 5 of flower and doing well. It would probably be doing better if I hadn’t made mistakes. Mine looked much more scragglier than these. Your medium may be little hot for the seed? Maybe. I would just keep on keeping on man. It’ll grow out of the scraggly phase.