Yeah - once you check out of the property, it gets substantially harder to ask for compensation for a poor experience. One thing you can potentially do is submit the after-stay survey with details on what happened. This gets formally logged in Hyatt's system and sometimes spurs the property management to reach out and offer some sort of appeasement points to keep their corporate parents happy. Complaint through the concierge probably won't get you much -- usually only good when you're still at the property.

My data points for points appeasements:
- Andaz Mayakoba. Stayed in suite which had no heat in the plunge pool. Brought it up with building maintenance and the front desk twice during our stay. On checkout they proactively acknowledged that this was lacking and refunded 1 night's points (25K) stay.
- PH Aviara - had a stay where they actively denied upgrade to available standard suites despite them being obviously available. Left a review about the shady practice and they refunded 25K for the slight.
- HR Birmingham - they gave away my two pre-booked suites to some football boosters who were in town and downgraded us into standard rooms instead. Called up MHC/Globalist line immediately after checkin, and the concierge (not my regular one) they just refunded my points in its entirety. So basically given the (downgraded) rooms for free.