Can't disagree in some ways mate, he's clearly got lots of good attributes, although it boils down to what success looks like, and what we think Everton are capable of achieving?
Everton were 4th in terms of league titles when he joined, and had fairly recently won the FA Cup, personally I'd argue four European qualifications and an FA Cup final in 11 years, wasn't that great.
Yes there were times we played some good stuff, but long term success? I've seen nothing to suggest he's capable of that. It's been 30 years without a pot, and he's been in charge for over a third of that time.