I don't know for sure who are "bad" cardinals, but I've heard these men griped about by conservatives, or stating things which appear to gripe about conservatives, or praised as the Great Multicultural Hope* by liberals. I do not attest that any of these deserve their bad reoutations, or that what I've heard as their reputations is indicative of their greater reputation:
(*I figured liberals would consider the Great White Hope to be racist. :^D)
Oh, and don't be discouraged by this list. Note that half of these guys are gone in 5 years! And these guys have to retire from being bishops about 5 years earlier:
Desmond Connell, Ireland, retires tomorrow.
Jean-Marie Lustiger, France, 9/17/06
William Wakefield Baum, US, 11/21/06
Jorge Medina Estevez, Chile, 12/26/06
Adolfo Suarez Rivera, Mexico, 1/9/07
Carlo Sodano, Italy, Secretary of State, 11/23/07
Friedrich Wetter, Germany, 2/28/08
Giacomo Biffi, Italy, 6/13/08. Actually the Cardinal of Baloney!
Dario Hoyos, Italy, Prefect of Clergy, 7/4/09.
Theodore McCarrick, US, 7/7/10
William Keeler, US, 3/4/11
Bernard Law, PROM, 11/4/11
Edward Egan, PRONY*, 4/2/12
Renato Martino, Italy, 11/23/12
Walter Kasper, Germany, 3/5/13
Godfreed Daneels, Belgium, 6/4/13
Giovanni Re, Italy, Prefect of Bishops, 1/30/14
Claudio Hummes, Brazil, 8/8/14
Roger Mahony, PROCa* 2/27/16
Oscar Rodriguez Maradiaga, Honduras, 12/29/22
Sean O'Malley, PROM*, 6/29/24
*PROM=Peoples Republic of Massachusetts, a former territory of the USA.
I don't know why everyone here is assuming that Cardinals would be affected by a change in the retirement age. While cardinals have to submit their resignations at 75, like other bishops, the pope has generally let them stay on in their sees well past that, usually till they are 80 or so. Unless there is a health problem.