Pothole Squad's first effect only stop Traps when it is Summoned (Gamea is wrong, it does not last a whole turn), so outside summoning window it no longer save you from TTH.
Pothole Squad's second effect only stops Trap Hole cards from being used when a monster is Summoned, but TTH can be activated anytime, it's not restricted to when a monster is summoned like other Trap Hole cards.
Neither player can activate Trap Cards when this card is Normal Summoned.
Neither player can activate "Trap Hole" cards when a monster is Normal/Flip/Special Summoned.
While "Goblin Pothole Squad" is on the field, you can still activate "Chaos Trap Hole" against the Normal/Special Summon of a monster.
This is all the rulings for the card and btw chaos hole is dark trap hole just the JP name
Chaos Trap Hole is a different card to Dark Trap Hole (which got renamed to Darkfall because it's not a "Hole" card at all in Japan.) Chaos Trap Hole negates Summons, which is why Pothole Squad can't do anything about it. (It only prevents cards being used in response to already-successful Summons.)