I think you may be on to “something” but must take in other factors as you say ongoing burnout lack of weekends off etc
Where we are “creative” is very very personal! You would not believe 3 of my most creative spaces. 1) Relaxing outdoors on a hammock strung between 2 honey locust trees looking straight up into the green lacy canopy ( not a computer, I-phone or papers in sight! 2) Laying on a beach in California far from any paperwork 3) Sitting at a busy restaurant counter,sipping coffee after working a 10-12 hour 3rd shift perusing my work notes!
I too noticed a definite decline in creativity when one micromanaging director scheduled me all weekends with the exception of my two weeks vacation.
Another indicator are dreams in which you are out of control. Examples are looking for an unfindable object, house,keys or car that seems to repeat over weeks or months. Same with dreams where you are in danger, being chased by a monster, bad guys etc. Our dreams often reflect the turmoil in our lives!
Symptoms of overt social changes. Finding no pleasure in interests or hobbies we once pursued.
If you find other big changes along with the change of office location, you may need to sort out which carries the heavier weight.
The Leftists have left us!