

That submarine imploding near the Titanic will never be not funny. Especially since the guy who designed it believed in the “move fast and break things” nonsense.
Every person on board paid a pretty penny to be on that sub, so no pity from me either (except perhaps for the teenager who was reportedly terrified to go on, but did it to please his rich prick father).
I would say, like many others, Remmina.
Putty also has a Linux version, so you can use that as well. Its session management is a bit clunky, but it works and it offers some fairly good functionalities.
But ssh is first and foremost a command line tool. As others have said, invest some time to learn its commands and configuration files.