Of course we do - he's the first team coach and we're mediocre. Anyone who willingly accepts mediocrity for years and years, under different regimes and managers, and never move or changes to get out of that situation, is themselves mediocre. It's practically the definition.
Nothing wrong with just collecting a paycheck in a bullshit job - but first team coach at Everton shouldn't be a bullshit job. If you want to argue that results don't matter for a first team coach, or there's some exceptional reason to excuse serial, long-term under-achievement then please share - it'll be bollox but it might be interesting. But stop with the 'none of us know if he's any good' nonsense because all of us know that he isn't.