Try a sunrise travel to overcome the crowds, watch easy spill over the caldera
https://dallasqhmp820.opalvector.com/posts/santorini-day-tour-itinerary-see-the-island-s-highlights-in-one-day-2
Try a break of day travel to beat the crowds, watch light spill over the caldera, and trap serene streets in the past the island wakes up.