If I had seen the egg case I'd stop unpacking and request to move room. This reminds me of our stay at CY Merced. Bought a pack of cookies from Safeway, left it on the desk inside the room (so we can use it for breakfast). The next morning we woke up when the kids shouted - Mummy daddy there are tons of ants eating our cookies!

We woke up to see about 1000 ants in our room (we were not on the ground floor). We first checked if the ants were something that was brought into the room - we checked our rental and there was no sign of any ant. Then one of us tried to rescue the cookies and one of us tried to spot where the ants went - it's definitely from the hotel.

Told the FD, they agreed to waive our bill (booked directly with Marriott).

OP - if you are not happy about your stay, you can always contact Marriott. There shouldn't be bugs in any hotel room - my first bed bug bite was in the former HI Willowbrook in Houston - now they changed flag to become a Wyndham Garden. Contacted IHG after the incident but unfortunately they can't do anything about it as the hotel has changed flag.