Those ♥♥♥♥♥♥♥ PRICKS (Mechs, as they are called officially, but I prefer my name) are a ♥♥♥♥♥ to kill sometimes. I'm sure you all agree. However, there is a solution: follow in Kurt Cobain's footsteps. If you DON'T want to put a 10 gauge shotgun to your head like Eugene Root, then follow these short and simple steps:
ONE- Uninstall Ghostrunner.
If you don't want to do THAT EITHER, fine. There are four approaches to killing these ♥♥♥♥♥♥♥♥♥.
LEEEEROOOYYY JENNKINNNSSS: Run straight at the thing. If you want to do this, use either Blink when in range (assuming you haven't died) or use Tempest to blast their lasers right back at them.
Point A to Point B: If you are on the ground and running at them, and not suicidal, then simply wait for the mech to shoot, and slide underneath their attack and cut their legs off. Easily the simplest way to dispatch these robo-hobo ♥♥♥♥♥♥♥♥♥.
Death from Above: Jump over the attack and/or use your dashes midair to get out of the way upwards, or just blink/slash at them from above to kill them before they do you.
The Ol' Bait and Switch: Jump upwards, baiting the dumb ♥♥♥♥♥♥♥ robot to shoot, then dash downwards underneath its attack and cut its legs off. You can also dash to the left or right depending on how close it is to you.

Hope this helps you, and have a fantastic, mech-free day. <3
Sincerely, Zetakiller10