The 54-year-old made so many mistakes at Newcastle United... but here are three that stand out.
During Steve McClaren's ill-fated time at St James' Park, several Newcastle players let him down.
But a lot of them were allowed to let him down by McClaren's own poor management. The former England boss is known for being a good coach and being a friend to the players. When it comes to disciplining them, he has nothing.
And that's how it proved with Fabricio Coloccini. The Argentine produced a handful of good performances this season but was largely awful - and an irresponsible captain.
Did McClaren ever criticise him or punish his poor form, however? No, he simply praised him for doing a terrible job on a weekly basis...
The smiling man
On a similar note, McClaren broke all ties with most Newcastle fans after a 5-1 defeat to Chelsea recently. The Magpies were once again woeful, showing no fight or desire whatsoever.
But how did the head coach react? He was all smiles and supporters were livid as McClaren grinned his way through his post-match interview.
For several weeks, he claimed Newcastle would stay up if they played the way they already had been. They were terrible all season and, after another equally poor performance against Bournemouth, the shocked coach suddenly came out and said the team would go down if they played like that...
That was the time the Newcastle hierarchy were convinced McClaren wasn't the man for the job, although they should have seen it months ago - and could have known before he even took up the role.
One of the biggest problems the 54-year-old faced was his lack of authority. By the very end of his tenure, he was making the exact changes he should have done a long time ago. But, by then, it showed his desperation - as the players simply weren't responding anymore.
Players he had vehemently defended all campaign were dropped, while Jonjo Shelvey was named new club captain. Again we come back to Coloccini, however, as the Argentine should have been stripped of the captaincy a lot sooner than he was - and it was done while he was injured, hardly strict management...