What does it take to get a Reddit account with login that works more than once (the first one but none thereafter)? - eviltoast

I keep having my Reddit account invalidated with wrong password error message. I create a new account with randomly picked user name and random password and get logged in OK. If I log out I can’t use that same name and pw to login again, pw error. What’s going on with them. It has to be one of the worst sites in the Internet. I want an account so I can follow four subs and have the ability to create permalinks for comments I want to share elsewhere, i.e. the Ukraine sub here, Mastodon and in email with friends. Is it a pointless venture to try and get a stable account?