If we were winning and competing for a title those 3 wouldn't be targets because they wouldn't be playing. One of the reasons we are not winning or competing for titles is that bad players like Aurier and Sissoko are starting for us while City and Liverpool have nobody close to as poor as those two.
We had Walker making mistakes, yet he didn't get anywhere near the amount of abuse because we would end up winning and it wouldn't matter. Because yes, we were a better team.
But Sissoko was a target when we were competing. We signed him after finishing 3rd and then had our best Prem season ever.