Coria's even more frustrating than Safin. Marat has had his great share of triumphs at least.
That's true. At least, he achieved great things in grand slams and davis cup.
For me, the frustration concerning Marat comes from somewhere else, all the injuries and his monumental mood swings. It's really difficult to live with his up and downs and impossible to forget some horrible matches.
And when the player show his frustration, you feel frustrated too.