Also if you have children - I am not sure how it is for you in Germany, but in Poland landlords will not rent to anyone with children. Or ask twice as much because the assumption is if you don't have home already, you are suspicious...
in germany that's illegal. you are not allowed to deny families with children, and even small pets (small dogs, cats, hamsters, etc) can not be denied.
They just ghost you if you aren't chosen, good luck proving anything.