Yes that is an interesting statement - Doc Stock left in 2021, VC Roseneil was appointed in 2022 - I know a week is a long time in politics, but is a year such a long time in higher education??
'K wasn't supported' is, as SinnerBoy suggests, very passive.
Sussex could have 'supported' KS till the cows came home, 'supporting' her could have been paying for the security systems in her home, or for close protection as she walked around her own campus, but what was needed was action against her persecutors, and action to remove the policies which curbed her right to academic freedom.
The uni could have 'supported' Doc Stock by buying her an armoured personnel carrier to commute to work and move safely around the campus - there you go, KS is fully supported, job done, no regrets.
Statements full of things like regrets, outrage, motivations, suspicions, victimisation, bias, etc., are missing the point about what actually happened.