Long time lurker, first time poster here.
Rather unbelievably, even what you wrote doesn't do how awful KU has been justice. Kansas hasn't won more than 1 conference game in a season since 2008. As far as I've been able to discover, KU has the worst 12-season conference winning percentage in major college football history:
1. Kansas, 2009-2020, Big 12 - 7-98 (.067)
2. Univ. of the South (Sewanee), 1929-1940, Southern/SEC - 4-54-1 (.069)
3. Western State, 1925-1936, Rocky Mountain Conf. - 5-59 (.078)
4. UTEP, 1975-1986, WAC - 8-78 (.093)
5. Kansas State, 1941-1952, Big 6/Big 7 - 6-58-1 (.094)
Back in 2017 I got curious about how to illustrate how bad things were, and have tracked the above info on phog.net every year since then. My research may not be completely exhaustive, but as far as I know, these are the only 5 major college programs to ever have a sub-.100 conference winning percentage over 12 seasons, with the Jayhawks "leading" the pack. Definitely deserves a place in a "Kansas is Hopeless" thread.