The main negative (PROBABLY) being thrown around is his age. Opposing coaches on the recruiting trail are probably mentioning his age and wondering aloud to recruits whether he will be around for more than a year or two during their potential UConn careers.
Every coach would like to retire a winner - at the top of his/her game. If Geno can pull off a championship in '23 or '24 with Paige, is it illogical to assert that he would consider retirement then? If so, the '24 prospects {
rivals might assert} would never play for him.
I know of no instance where recruits have disclosed that such "negative recruiting" tactics are being used, but I would be completely unsurprised if it is happening. It certainly happens in football to older, successful coaches.
BTW, I hope he and Paige get one more NV (in '24).