Pixels may have what seems to be an unusually high rate of problems over time if you judge things by anecdotes on Reddit. There are many more folks just puttering away on their Pixel oblivious that there are any issues at all (or even posting their own anecdotes in response to the anecdotes about problems telling folks that their Pixel is fine). But they don't generally show up leading the pack in industry reports from the folks repairing phones, at least the ones I've looked at.

Every manufacturer has some level of issues, Google sure seems to be about average. I will say that their insistence on automated (read: poor) support can sometimes exasperate problems (which then leads to more anecdotes being posted).