Insofar as kit being late and then ongoing supply problems, all clubs seem to have been equally screwed....based on information to hand.
Without knowing the details of each club's agreement with them, then it's impossible to say or rank impact beyond that.
e.g. We have ditched them and need to find a new supplier for next season...but they were supplier AND shirt sponsor for St Mirren, so in ditching them they have a new sponsor and supplier to find.
If a club were on a licensing deal where JD were paying for the rights to make and sell kit, then there's no financial loss.
If a club were on a manufacturing deal where JD were making and suppling the kit for a club to sell, then financial losses could be quite substantial.