Location

If I publish an ad, then it comes to the location. After filled in the state it comes to the city. But there are hundreds of cities. It's painful to scroll through all cities until you've found yours. This is really no great user experience. Can't this be done in the mode, that if I start typing search results will appear? I can't start a site with this "handicap". Latest at this step the user will leave the page.

Different themes use different location selectors, you might want to consider theme that supports auto-complete.
Alternatively check this:
https://docs.osclasspoint.com/changing-between-drop-down-and-autocomplete-for-locations