Is there still room for another vehicle rental app?

I've been thinking about building a vehicle rental platform, but I'm hesitant because there are already so many established apps in the market.

I'm curious to hear from people who have actually rented bikes or cars.

What do you dislike about the current apps?
Have you ever avoided renting because of a bad experience?
What feature do you wish existed but doesn't?
What would make you switch to a new rental platform instead of using the popular ones?
If you could change one thing about existing rental services, what would it be?

I'm not trying to advertise anything—I just want to understand whether there's still an unsolved problem worth building for.

I'd really appreciate your honest opinions, even if your answer is "the market is already saturated."