I already have a bunch of solutions to improve the bots, basically make them play at different speeds depending on the difficulty, make sure they always win to avoid easy victories, make sure they play a minimum amount of steps in the earlier difficulties.
The bot Vs bot mode is a already lot more fair, for the custom bot to win they need to win in fewer steps or lose in more steps. But I didn't think that was fun for players, so that's why the current player Vs bot mode is more of a flawed race.
Thank you for you feedback and kind words. Can't wait to try out your game later today, it looks awesome!
Edit: It was really cool, if anybody is reading this go and check it out.