Brennan, 22, has admitted to being hurt by media criticism of his hot and cold form approaching his 50th game for Brisbane against Port Adelaide at the Gabba on Saturday night.
"It is very hard not to take it on board because I'm human," Brennan told reporters.
But it seems he won't be using Lions coach Leigh Matthews as a shoulder to cry on.
When told that Brennan had admitted to being affected by critics, Matthews said: "If you get hurt by criticism you are kidding yourself, really.
"Who cares? You will get applauded or criticised by what you do."
Matthews was just as candid when asked about Brennan's AFL progress to date.
Since his selection at No.3 in the 2002 national draft, the flashy Brennan has promised plenty but only shown sparks of brilliance - much to Matthews' frustration.
Inconsistency ensured plenty of flak.
"You'd hope his next 50 is better than his first 50," Matthews said of the Northern Territory product.
"Logic tells you it can be and should be. It's up to him to make sure it is."
