My iPhone has pulled in all contacts from my Gmail account into my contact list. It’s gotten so out of hand that it’s difficult to find contacts I need.
Is there any easy way to remove these and keep them from coming in again?
iPhone 6, iOS 10.3.3
You can simply "hide" them from the contact list by tapping on the "groups" link/button at the top left of the contacts screen (scroll down until the GOOGLE MAIL appears and uncheck the lines about the contact subgroups - or ALL - that you want to hide)
if you really want to delete those contacts from the iPhone, go to Settings → Account & Password → Google Mail and disable the Contact section