I actually liked this map even though there's a few annoying spots and the tricks are a little difficult.

The opening is pretty cool but if that crusher hits an enemy it takes forever to raise back up so I liked just killing all the enemies to prevent that from happening. Decent time save just jumping accross the toxic tunnel to yellow key instead of raising a bridge from above.

Blue key grab is pretty easy but sometimes the door can close on you with the trigger being the blue key spot to open it back up.

One annoying spot is after entering the blue door and hitting the switch, there seems to be a trigger at the top of the stairs to raise a bridge which can be easily skipped by mistake. I take my time here to make sure it gets raised.

Lastly the red key puzzle can be entirely skipped which saves a ton of time. It's possible to inch around the side even if the gate blocks you from the key.