Shameful. Unforgivable. I'm not big on soccer but this has to be the most cruel sacking in the history of sports.
In soccer, as in life these days, you're as good as your last performance. As they say in the financial markets, past performance is in no way indicative/predictive of future performance. In other words, "what have you done for me lately?" is the only question that matters in this brave new world. Is it good or bad? I think this is no longer a moral issue, it's just the zeitgeist. Get used to it.