The quickest fastest possible way to do this is - Once you’re able to do RANKED FREE-FOR-ALL RACING - Start a game up - Select your car - Once the first race starts - Don’t touch your controller for 46 seconds - This will allow you to get kicked <— This is what you want. Do this 10 more times and the Achievement will pop. This solution is only for people that don’t care about losing. The progress will not start to show until you do this 2 times. For example - Do this 1 time it will say 0/10 - Do this 2 times it will say 1/10 - Do this 3 times it will say 2/10 and so on. Good luck!
Just a quick update on this for the people that are a bit confused. It is possible that you might have to do 1 race legit but I cannot confirm as I have not tested it but other than that you just need to follow my solution that is posted above and the Achievement will pop. You don’t need to restart your console and you don’t need to race the last race. Just simply do the method posted above 10 times and the Achievement will pop once the last race has finished. The game will not show your progress until the previous race has finished.
If you’re still having trouble with this message me on Xbox. Gamertag: Rulky