Client freaked when I charged $850 to install Echo drip irrigation and then demanded I redo the whole yard for free

Had this nightmare client who wanted a basic drip system for her flower beds, so I quoted $850 using Echo components because they're reliable and easy to install. She signs off, I spend two days digging trenches and hooking up the timers, everything tests perfect. Next day she calls screaming that it doesn't cover her 'vision' and wants it all ripped out for nothing, SMH. Guy in Lawn Care Professionals FB group said just lien the property but damn, these entitled homeowners are killing me.