You should try living in Hong Kong and see how you feel about overpopulation. As climate change makes huge swathes of land unlivable and population continues to grow that will be your future.
'You should try living in the Yukon and see how you feel about overpopulation. As climate change...'
Your experience is valid but the population density of a particular city (or lack thereof in a particular territory) is a poor indicator of whether the earth's population is too high for its carrying capacity.