How do you get the business to agree to your design? I would love to do something like this but when I used to try I always ran into the same problem. The bus

How do you get the business to agree to your design? I would love to do something like this but when I used to try I always ran into the same problem. The business owner would rather me follow the poor design choices of their competitors (hard to read text, bloated, random pop ups, etc). I always did it for them but it really killed me inside.