As much as i agree with you, i think Chappell is not the sole reason we lost. I don't think he got what he wanted, and if you don't look at this WC, i think he did ok. I would give him one more change(a short one though) to prove himself.
Let's face it, our lost was due to collective failure(management, selection, composition of the team, captaincy & coaching), not individual failure. One partnership in the SL game would have changed everything, we failed completely as a team.