I used to pronounce it Eye-Dee. Hey I'm an artist, not a psychoanalyst.
The last boss was actually a button, oooh scary. Weird really, they have those Authority heavy mech dudes who are pretty tough and they only attack one or two at a time. A half decent boss fight would be a massive group of them or evil bad guy Cross in one, so he would actually turn up in the damn game!
Instead you get muties you can use buckshot and steel AR rounds to easily kill.
The base even had scene of dropships taking off and their vehicles outside. Both would work well as mini bosses and justify buying those vehicle hunting rockets that were only brought by accident.
The game as a whole only has 3 bosses which is really disapointing for a old skool corridor shooter as they act as a good mechanism to bookend sections of the game if your story isn't good enough to do it for you. Two of those bosses were just ordinary bandits with health bars and one of those didn't even have anything special so just fell over after a couple of poprocks.
The only big boss was quite early on in the game and was essentially a tutorial for the rocket launcher. Lacked challenge because of the auto heal, otherwise it would have been quite tense.
Shame really as id have a great track record with bosses, Cyberdemons, Spiderdemons, Shamblers, Tank Commanders and that big bugger in Quake 4 that almost took out it's own communication tower 'cause it was a bit dim.
Quite why they dropped the ball on this one is annoying.