I may have the answer.
Did you upgrade your Offroad vehicle?
When I completed the Hazard Crew (still have to beat the boss) I used the Raptor and was able to get through. Using the same logic, I upgraded my race car to an Acura NSX so now all the Racecar crew members are rookie at lvl 290 and pull up next to me in GTX, Porshe etc. and are hard to beat. So, if you upgrade, the crew are also upgraded so to keep the game competitive and take longer to complete. Sucks for you and me that did not know this and now have to really concentrate on getting past the respective crews.
If this is not the case for you may it be a warning to others muahahahaha don't upgrade until after the crews are beaten LOL