All video & gif below are based on a world without cave, mods, net lag. And lag compensation is OFF.
The giant worm is just a thing for showing how ppl do enjoy gloating. Because most ppl don't care about how other players feel about this worm when they have different play-style.
In fact we all know it's easy to completely avoid this "boss" with many method. You could just run out of this boss fight then nothing could do bad influence to you. But this cannot prove that the giant worm is a good designed mob.
Now please check my video. It shows that you could kill the giant worm with only 1 speed-boost item (eg. cane) + 1 weapon THEORETICALLY, just like how I did in the video before 14s. But for most ppl the game has generally lag - My video is based on a world without CAVE and MODs (only T mod for testing). In most generally game play, you can't do same thing as my video to fight the giant worm with "avoiding, go close the boss and hit 3 times, avoiding, loop" because of the cave lag, the server lag and others.
And when there's generally lag, The AOE effect - that "wave" of the giant worm when it head in/out of the ground - would be not able to dealt with. That "wave" AOE would hit you by its unreasonable range and slow your next action.
Even you are enough lucky to avoided those ground wave AOE, when you switch your weapon/cane, there's a randomly delay which would makes you frequently failed to get close to the worm head in time - then you loss the chance to hit the worm head safely.
Ofc I know there's an officially method to dealt with this giant worm by feeding it many items. But this method SHOULD NOT be the only method to kill the worm with your own character. As an early game boss, it SHOULD have a method to kill without massive item loss. Also there's another fact that the giant worm would appear in every area (including the ancient orchestrina room), and not every area has enough items for current giant worm fight.
Besides, the whole AOE hitbox effect of the giant worm is broken as well. Let us highlight this period of my video -
Could any "giant worm lover" can explain this gif for telling us why giant worm is a good reasonally boss?
Also the giant worm is a boss which has chance to appear at day 26 (very early game) but could easily one-shot log-suit Wilson. Considering Charlie would attack you when there's no light while you are moving "under" the giant worm (the swallowing would have chance to make you out of your light), the swallow combo would dealt more ridiculous damage to a full-armed character on early game.
Is all of these things reasonable?