You have to remember that there is a route on the flight plan, and then there is the route the plane flies. These are quite often not the same. Air Traffic control can and does regularly does change routes once a plane takes off. This allow ATC to control the sequence of plane to avoid congestion, reroute plane around bad weather, handle issues with weather, traffic, etc at the destination.

So objecting to the route based on what is planned may be an exercise in futility. If you take another flight it is likely to be routed the same, or even if it is routed differently end up fly the same route. There are only so many ways to get from point A to point B

You have to remember that there is a route on the flight plan, and then there is the route the plane flies. These are quite often not the same. Air Traffic control can and does regularly does change routes once a plane takes off. This allow ATC to control the sequence of plane to avoid congestion, reroute plane around bad weather, handle issues with weather, traffic, etc at the destination.

So objecting to the route based on what is planned may be an exercise in futility. If you take another flight it is likely to be routed the same, or even if it is routed differently end up fly the same route. There are only so many ways to get from point A to point B.

One way to better ensure that the flight does not fly over a certain point would be to book from point A to point C to point B. But that is likely more trouble than it is worth.