I *love* postgresql but pgadmin is a big nope. I keep hoping someday...
1. UI remains klunky/ugly AF. Beyond aesthetics, you lost me when I can't copy/paste text from the UI e.g. error messages... the new connection screen (a user's first experience) are super klunky and don't get started about setting up an SSH tunnel... crazy error messages.
2. system stats requires an extension... that's not available in AWS RDS... wtf?
3. there is no 3 - pgadmin already lost me because these things are too easy to "get right" and I'm not going to give it more time when there's lots of other tools.
pgadmin team - sorry!!!