This is not something that can be avoided by not using google. Many websites use the google recaptcha program at account registration to prevent bots from registering. Some ddos protection systems use this captcha system.
You may have seen the "click to verify that you are human" type button on websites. A simple version exists where you only click the button and that's it Some people think it works by some mouse tracking magic. My theory is that it uses cookies to verify you are logged in with your google account.
If you do not have a google account, you always get a complicated captcha which says like "click on all of the crosswalks", buses, bicycles, etc.
Yesterday I was visiting some website and an antibot protection gave me the scan-qr-code captcha. I refreshed the page a couple times and then it gave me one of the click-on-bicycles captchas instead.
correcting my post to not say cloudflare. it seems that cloudflare has their own captcha service.