Of the nine people who have appeared on Question Time most often, two might be considered right-wing: Farage and Ken Clarke. The remainder are Labour or Lib Dem MPs: Shirley Williams, Menzies Campbell, Harriet Harman, Charles Kennedy, Clare Short, Paddy Ashdown, and Roy Hattersley. Of these, Farage is the only Brexiteer; Clarke is a right-wing Remainer.

Just this year, it has featured the following left-wing politicians and journalists: Yasmin Alibhai-Brown, Bridget Phillipson, Ash Sarkar (a libertarian communist), Wes Streeting, Tracy Brabin, Jenny Gilruth, Ian Murray, India Willoughby, Lisa Nandy, Stephen Kinnock, Thangam Debbonaire, and Sarah Jones.

I think perhaps your issue is with right-wing people getting any airtime at all.