Its obviously poor now, due to his awful performances last season. At the time it wasn’t anywhere near as bad as it currently looks.
What was given to him, in terms of wages and signing on fee was pretty in line with his experience, quality & the fact he was a free agent.
Chelsea offered him very similar wages, but a shorter contract and signing on fee.
It was a poor decision then, as well. Everyone knew how this was going to pan out, but we soldiered on anyway.
Regardless, we're stuck with him for the remainder of his contract most likely.