Can't kill this boss!

[jack]

On the Weird Machines mission when fighting the multi--legged goliath I cannot reach anywhere close to killing him. On my first two attempts I got him at half or a quarter health and died. I've failed so many times, and throughout them I have no items, or chips that can restore my health. Not to mention I seem to do nearly no damage to it, and it regenerates health after every attack.
At first I thought it was because I lost my chips, or I was just missing an important tactic, but I looked online and can't seem to find anything. In every video I watch the players can defeat it, but I can't even get it down to half health.
I believe I've tried all the obvious solutions. Such as turning it to easy difficulty, but nothing has helped. Most of the other bosses were relatively easy to beat on normal difficulty, but over the at least one hour of gameplay I have on this one, I cannot defeat it.
If there's even a small chance you know the solution to my problem please post. I've really enjoyed Nier Automata so far, and just want to progress!

[Exarch_Alpha]

You must not allow it heal. Chase the bastard, use damage boosters and whack away near the building. The only problem is when there is electricity in the water, when that happens just use Gatling laser and fire and go back towards the resistance camp.

If you destroy a leg it stuns it for a bit.

[FurtivePygmy]

Are you progressing through route A? The next similar boss is tougher that this one.

Weapons you need are Ancient Overlord sword (for bullets denotaing) and another small sword or spear. You have to choose between full attack (weapon attack, taunt, charge, critical) or full defense (max hp, resilience, damage absorb, revenge, anti-chained damage, revive) plug-in chips setup. Chips for both setups are shock wave, evade range up and overclock. Damage the boss with wave attack of your weapons and fire him with either Pod B or C. Triple charged lasers and hammers deal significant damage to a single target. Mirage program is useful against dense crowds of enemies.