Historically, Pandev. When he arrived from Red Star he was meant to be the bees knees but he was complete shit.
In relation to Stephane Dalmat, what was really sad about him is that there were a few occasions when he showed glimpses. But that was about as good as it got. I kind of feel sorry for him because it got to a stage that whenever he got the ball, our own supporters would boo him. The only other player that was treated similarly (although not as bad) was Mikael Silvestre. He too got booed but nothing like Dalmat.
Can I just ask, does anyone remember Felice Centofanti? I was just a kid at the time but I still remember it as if it was yesterday: I remember him dribbling forward on a break and someone at the Meazza doing Native American Indian cries because of his long hair. I have been an Inter supporter for thirty years now but I will never forget that crazy shit and everytime I think about it, I laugh! I don't know how to post photos but here are a couple of links:
https://twitter.com/hashtag/thohirite?src=hash
https://www.inter.it/en/news/2015/05/23/happy-birthday-felice-centofanti.html
There was also a Brazilian we Moratti brought in called Vampeta. He played one game for us and then pissed off back to Brazil for Carnival and never came back.
More recently, Rivas, Schelotto, and Perreira. Rivas was just shit. At one stage, he was being compared to Cordoba. No fuckn shit, Rivas did not have even an ounce of the ability that Cordoba had in his left small toe and everything he did was calamitous.
I absolutely hated Perreira. Just seeing him in our jersey and in the eleven used to enrage me and that was before the cunt even kicked a ball. Fuckn useless bastard. As for Schelotto, I just thought that he was a useless long haired poofta that needed a haircut.
Other special mentions should be Sergio Conceicao, Dominic Morfeo and Queresma.