3 mins no chance to hit garmoth or other bosses.

What kind of B*llshit sorry, this system makes no sense !!!

It's an event, stuff happens during events.

Dont worry, you're just missing out a couple of crons.

It is messed up.  People only fight bosses during events and at the beginning of each weekly cycle.  Sometimes it takes fifteen minutes to kill a boss, sometimes 29, and sometimes we don't even come close to killing some bosses.

PA doesn't know how to keep things balanced.  It's all on/off with them.

Um, how is it possible that you cannot hit a boss even once in 3 minutes?
If you mean 3 minutes is not enough to get to a boss after it spawns, there are plenty solutions, like the one everyone else uses.
Go to the boss before it spawns (spawn times are fixed, look up the schedule; also, there are prior ingame notifications you can set up);
Place alts at the bosses (even new players have enough free character slots to put alts to most bosses); if your hardware cannot handle swapping from one boss to an other if there are multiple bosses, then make yourself a schedule on which boss to prioritize and when.

Also, you are right in a certain aspect; a teleport to/from the world boss would be quite useful.