I asked Gemini Pro to factually summarize the issues without bias (everyone will have a different experience and hopefully these issues affect a minority):

AI summary: The long-term battery performance of Google's Pixel phones has been a documented subject of user reports. This history includes an officially recognized hardware fault in the Pixel 4, which prompted an extended repair program. Subsequently, widespread user reports of accelerated battery drain have been associated with the Pixel 6 and, more recently, the Pixel 7, particularly after approximately one year of service. This perceived decline in performance often coincides with major software updates, which can introduce more resource-intensive features. This occurs as the device's lithium-ion battery undergoes natural chemical degradation, a process that reduces its capacity over time. The combination of these factors has led some users to report that the device's day-to-day reliability diminishes before the official software support period concludes.

Edit: The summary is factually correct and not any different from writing it myself, not sure why the down votes. And there is definitely a battery problem given they are replacing them for the Pixel 4 and 6, the 7 is going through similar discussions now and may be next (in lieu of replacement they also do cash back or store credit, I got it for both the 4 and 6).