For me it was early on during the time where Chrome was new. First they didn't support plugins so adblockers were not working so I'd see ads and pop ups everywhere. Next they did support adblockers but they sucked due to API limitations. I realized then that they were primarily an ad company, I know the adblockers have somewhat improved for Chrome but I went back to Firefox and never bothered again. I only use Chrome / Chromium for web development.