Leeds fans I spoke to was because he wanted to work with a small squad, so refused to buy - but then ran them into the ground so the key players were never fit, hence the poor results.
They respected him for getting them up, but none were too devastated when he finally got the chop for that reason.
My lad lives in Leeds and has numerous Leeds supporting mates ( much to.my disappointment), he's also mates with a physio who is employed by the club on an ad hoc basis, they understood the reasons for Bielsa going, and it was because of a bad run of results, the owners were getting twitchy and so he was replaced. But to a man they all say as a man manager and tactician he was fabulous.