Thank you for your comments!
It's not "pay to win" certainly in the sense that you can't just buy a great car, nor can you choose boosters. Within a class some of the cars are going to work for you and some are not. You need to look for a combination of track, car, skill, practice and the right booster to win the day.
My personal sweet spot is with a certain Rare car, but I still enjoy racing with another Uncommon car, and still try and see how high I can climb on the Common leaderboards, too.
It is very competitive, yes, and very much it's you against the leaderboard. We know that's not for everyone. The arcade thing is also something we've thought about quite a bit and indeed, the game's main inspiration is a certain Japanese arcade hit.
I'm not sure what you mean by "being unable to win"? Sure there's only room for the very best at the top of the leaderboard, but just like in the arcades or any leaderboard driven game, the fun is seeing how high you can climb by practicing.
Anyway, thanks for trying the game and letting us know how you feel.