One of the biggest criticisms of Phase 4 was that it lacked an overarching narrative like previous phases. While there were some loose threads connecting the projects (such as the multiverse and Kang the Conqueror), there was no clear sense of where the MCU was headed.
One of the things that has made the MCU so successful is its tonal diversity. However, Phase 4 saw a number of projects that were tonally inconsistent with the rest of the franchise. For example, Thor: Love and Thunder was a much lighter and more comedic film than previous Thor films.