Guild Wars 2

I have recently encountered lots of buggy events so it can be the case that your zone was bugged. Yesterday i went to lvl 50-60 area and found 3 bugged event and 2 bugged quests out of 6 i tried(one completely bugged and in the other some part was bugged and it took 15mins to move 5% quest bar). At that point i had explored only 40% of the zone and got only 5 bar xp in 3 hours.
It were only low level zones that got tested well during betas and were stable for long time after release but high level zones got bugged as soon as more people started exploring there after release.
From your post it looks like low level zones have also started becoming unplayable(not good enough for taking you to appropriate levels after completion).

It happens everywhere not only underwater. Also rich veins have 10 ores but it still stops at 3 so u have to do the process 4 times.

I’m not able to buy anything from trading post. I can search an item click on it and next screen i see the buy button enabled. After clicking buy button it gets disabled for few seconds and then gets enabled again but trade doesn’t happen and no money deducted from my account and no item in pick up tab. Also i dont see any error message or warning regarding this.
Right now for me only option to buy from trade post is to tell friend what item i need and he send me through mail.

I can successfully sell an item to trade post and able to receive the money.

15% fees is really a huge amount and its forced on players since there is no direct trade, open stalls or cod exist in game. People are already trading based on trust, send an item to buyer and hope he pays you the agreed amount. It just opens a free opportunity for scammers nothing else.