I never had a crash on the Terminal application because I never used it (or mostly never). So, I can't answer your first question.
About your second question, yes, there is a objectively better terminal emulator for macOS:
iTerm 2 is a replacement for Terminal and the successor to iTerm. It
works on Macs with macOS 10.8 or newer. iTerm2 brings the terminal
into the modern age with features you never knew you always wanted.
I've been using iTerm 2 since I have the iMac and I never missed any feature of the Terminal application. Also, iTerm 2 is open source software.