I am a Google Maps expert and I can help you with this problem. I am already working on a similar issue with someone.
Let me tell you what I can do for this issue.
Google does not let us deal with the algorithm itself to modify its suggestions, but within the alternative suggestions that google offers, I can skip the route and pick the one that excludes the data you provide.
Does that sound good to you? We can talk further if you more questions. Thanks.