what a just totally bizarre perspective
all of the stuff that's being complained-about is absolute 100% table-stakes stuff that every http server on the public internet has needed to deal with since, man, i dunno, minimum 15 years now?
as a result literally nobody self-hosts their own HTTP content any more, unless they enjoy the challenge in like a problem-solving sense
if you are even self-hosting some kind of captcha system you've already make a mistake, but apparently this guy is not just hosting but building a bespoke one? which is like, my dude, respect, but this is light years off of the beaten path
the author whinges about google not doing their own internal rate limiting in some presumed distributed system, before any node in that system makes any http request over the open internet. that's fair and not doing so is maybe bad user behavior but on the open internet it's the responsibility of the server to protect itself as it needs to, it's not the other way around
everything this dude is yelling about is immediately solved by hosting thru a hosting provider, like everyone else does, and has done, since like 2005
Google isn't mentioned in OP, did we read the same article?