Hello,
I understand your frustration. Today, I disabled registrations on my website as well due to an influx of spammers. It's astonishing how many registrations I received in a single day, and it's a major issue for my site too.
I've been experimenting with different solutions to combat this problem, and I've found that implementing KeyCAPTCHA seems to be more effective in blocking these spam attacks compared to reCAPTCHA. KeyCAPTCHA provides an additional layer of security by incorporating interactive puzzles or challenges that are more difficult for bots to bypass.