It is interesting to see that I am not the only one who has a problem with email logins. I find email logins make everything much more complicated than simple password-based authentication. I use a password manager both on the computer in the browser and on my smartphone and can easily have complex passwords filled in automatically.
I found it annoying to use myself:
Go to arp242.goatcounter.com Enter my email.
There are some online services that use email login. This means that instead of a combination of user name and password, only the email address is entered and a login link is sent to it. Basically, this is a good option to increase security a bit. The service only needs to store a list of email addresses instead of the corresponding password (hopefully encrypted and hashed) for each user.
But somehow this is also quite annoying sometimes.