Applying together would have made the most sense to show you all wanted to visit Canada. At least you would have been upfront that you all wanted to go. You could have shown a planned itinerary, joint costs, ties to return etc. Instead, your spouse and children decided to apply separately at different times. Then you applied last, probably thinking your profile was the strongest, but all your family members had visas so cannot show family ties. IRCC would not what you were trying to do.Okey, so just to increase my knowledge, what should we had to do? instead what we did? from start? avoiding such situation? I mean, what should we had the best way to applying? Should we had to apply all together? or something else? I am just asking advise to increase my knowledge.
If you want to purse through JR then get a legal opinion and start the process. You will need to explain why family members applied at different times and why you didn’t apply with them.