I think you are putting too much stock in the importance of a "Customer". If I'm using a service, i'm a user of that service. As a user, I do have a right to not like the changes to usability of that service.
You have those rights as a human not as an IG user.
As IG user you have only one right, to say "yes" to any changes they want and to obey to the algorithm of banning and censoring. You don't have any right if you can't enforce it. They can ban end censor your opinion and can enforce this right, you can't do anything about it. You are the product they're selling after all and they care about you in terms of as much revenue you can generate on this particular platform (macro picture of user retention).
As IG user you have only one right, to say "yes" to any changes they want and to obey to the algorithm of banning and censoring. You don't have any right if you can't enforce it. They can ban end censor your opinion and can enforce this right, you can't do anything about it. You are the product they're selling after all and they care about you in terms of as much revenue you can generate on this particular platform (macro picture of user retention).