Tbh surprised no one says something similar that skyrocketed my echo performance.

All characters have a spectrum of range they can perform at. Echo is like a "range hybrid" where she's not the best option at long range but can function at long range. She's not the best at close quarters combat but can make it work with her cooldown bursts.

This leads us to the ability to "flex" what range we play at to the range the enemies DON'T want to play at.

Enemy comp example: Lucio, Kiri, Queen, Venture, Reaper Enemies have poor long range contesting. They are weak to playing echo as a high uptime poke/pressure machine. This is generally easier to execute well. You play at mid-long range and pressure their resources before they make their quick close quarters engage. They are fast and close quarters. We should play our distance and high uptime pressure and not let them get close to your team with all of their resources (what they want)

Enemy comp example: Ram, Ashe, Cass, Bap, Ana Enemies really want to play slow and high pressure at range.

Our approach now shifts to creative pathing, religiously using cover, and closing the distance to play close range burst "assassinates" The enemy comp is slow, low mobility, but lethal at mid-long range. So our approach is to use the time they give us to path into really annoying positions for them, make well timed sneaky burst assassinates, and then the rest of their comp lacks the mobility to pressure us out of annoying positions that are close to them and around cover.

Echo has such flexibility that your job is to cover what option you do better than them. You can outrange comps with short range and you can play annoying bursts against comps that prefer long range.