Guild Wars 2

So Grenth has become almost (99.9%) impossible to do, even now not sure if it was changed to hardcore+ difficulty or it is just bugged.
But question is why not make Plinx event a bit harder? This event is so easy that has just become borevent (boring event). Can you not add more monsters etc. or just make it (Plinx event) harder/more difficult somehow?

Thank You.

Wow, that was just straight forward.
I feel really silly now.
Thank You All for help.

Update : Now my health went up to 19162.
As i said this is without any boosting items such as cookies and etc.

Sudden Maximum Health Decrease, Warrior, level 80 with over 317 unspent skill points

Before my maximum life (that red dot in the middle of the screen thing) was 20300, but now it has for some reason dropped to 18972.
This happened not long after I got killed when trying to get to Grenth event. I got killed and after going back to nearest WP I noticed my life (again that red dot in the middle of the screen thing) was only 18972- this value is when it is full and no one is attacking me.
I do not understand how this could happened since I did not change anything on my character (traits,armor,equipment,skills).
MY VITALITY before was the same as it is now, it is just my total health bar(red dot) is only 18972.

A) How/why this happened and what should I do?
B) Is there any formula how I could check what my maximum health should be?

Thank you very much.