Wow that was a frustrating read. I dd not know it was quite that bad. Just to highlight one quote

they don’t just crawl a page once and then move on. Oh, no, they come back every 6 hours because lol why not. They also don’t give a single flying fuck about robots.txt, because why should they. […] If you try to rate-limit them, they’ll just switch to other IPs all the time. If you try to block them by User Agent string, they’ll just switch to a non-bot UA string (no, really). This is literally a DDoS on the entire internet.