Not sure what is wrong with the terminal application?
Copy and paste works fine, though you need to do Ctrl + Shift + (C | V) I guess this is because the Ctrl combinations may be required by the terminal apps themselves.
If you want fancy tiled terminals there is also terminator or tmux.
This is way nicer than powershell which seems to take an age to load and won't let me resize it properly.
Not sure how the window resizing is FUBAR, but I also hate the default scrollbar in unity (unless I am running on a netbook).