Martinez - Inherited a settled top 5/6 side, when he got to proper grips with our squad he completely ruined it, signed mcgeady, niasse, kone, alcaraz, cleverly - reportedly had agreed to sign ahmed elmohamady before he left - he was taking us lower and lower. Two 11th placed finishes with the players he had was pathetic.
Koeman - Initially steadied the ship in his first season saw a lot of improvements early on in his first season, walsh may have been a large part of the problem, but the likes of klaasen will have been his signing - went on too many holidays, don't know how much he cared really.
Allardyce - dark day when he was appointed, but I think at the time it was a necessary move and he did the job he was brought in to do, long term he was all wrong for us though and rightfully let go, he's shut up a bit now of late regarding Everton as weve improved
For me the last couple of Martinez years were some of the worst ive seen at Everton, we had a good side Barkley, Lukaku, Stones, Barry, Baines & Coleman etc and Martinez was more concerned with playing slow tempo across the back 4 for 85mins, then mad panic for the last 5/10 mins of games because we'd be 1 down to west brom or someone shite because he didn't bother working on defending set pieces.