I get what you mean but he did eleven years with Boro and played 446 games. He was a top-class goalkeeper across that time. And yet he was regularly criticised by supporters, booed on at least two occasions I can remember - one for having the temerity to be a much better goalkeeper than Mark Crossley - and left without a testimonial ever being as much as hinted at by anyone around the club.
Do you not remember the noises and murmurs inside the stadium, and general stick he used to get whenever the ball was played back to him or he came out for a cross. I fully see why he may not be gushing with praise for Boro tbh. Some of our supporters are absolute morons. Singing Zenden used to be sh*te, signing we’ve only got one player to Tuncay, booing Schwarzer when he was brought back in for Crossley. Absolute morons.
He was the best ‘keeper I’ve seen play for us, we’ve had nobody anywhere near as good since and are unlikely to have one anywhere near as good any time soon imo.