Addendum: this may have nothing to do with your issues, but! the instance feddit.uk had all sorts of trouble with verification emails never even making it to the recipient spam folders, because the emails were getting flagged as spam/suspicious at the provider level, and they were subsequently blacklisted by Spamhaus.
I just looked on Spamhaus and futurology.today is not blacklisted, but you still may be getting flagged as spam at a higher (lower?) level than the user’s inbox filter.
feddit.uk ended up asking affected users to request verification directly via email, which were then manually approved.
I tried to create an account. I submitted my info, and got a Network Error banner, but was landed on the same page, with my info still in the fields. I checked my email in case it had actually gone through and I’d had a welcome email, but did not. So I re-entered the password/captcha and got a different error (I can’t remember, sorry).
Then I reloaded the registration page and tried again, but this time was told an account with my user/email already existed. I checked my email again, still no email. Then I tried to log in, but got the Email Not Verified error.
Still no verification email. Nothing in spam. Account was my user at your instance.
I’d love to see a video of your workflow. Not just a screen recording, to actually see how you work the inputs. I’d love something like this to get super fluent with.
On the web interface of your instance there is likely a setting called something like Hide Bots. Have you tried that?
The post links a similar free version (by someone else) that doesn’t have those Ys and Vs: