Your given the choice to accept or decline the pay for trip each and every time the alert appears on the screen.
You don't like the pay or the customer ratings or where it's going? Decline.
You can't help it if another contractor is willing to work cheaper than you. However if your consistent and only accept $1+ per mile trips, the other drivers consìstently working cheaper will eventually go bankrupt. But sometimes even I'll accept a low ball offer because it's doubling back over my tracks towards home and something is better than nothing.
Of you want a salary and a set pay each week, you need to get a regular job.
Ridesharing is a gig job using independent contractors.