Text selection and editing on iOS is broken in general. Trying to replace just a part of a URL in the Safari address bar with the clipboard contents is nearly impossible, even if you know that long pressing space moves the cursor.
As an iPhone user, I really don't understand Apple sometimes. I want to love their work, then dumb things like this happen. There's other pet peeves I have, but overall, I don't see myself ever going back to Android. You can probably say the same of any other software company.