I don't think he's rubbish or average. I think he's a very difficult player to evaluate because he's got some areas of his game that are very good but some seriously glaring issues in some basic components of the position - his positional awareness is genuinely poor, he has quite little tenacity, is not good 1v1, has a tendency to switch off, and honestly overall just comes across as quite lazy.
With regards to the debate about him being in CM and being a great passer - I definitely think he's miles off being one of the best passers of the game. He has little range to his passing, the only area that you'd say he's good at is his long passing and even that isn't as good as is sometimes made out, as
@Hammondo pointed out. That anyone could believe he's "One of the most talented players around in terms of passing ability" is crazy to me honestly, there's so much to "passing" that I don't understand how that claim could be made - I'm not being funny or anything, I'm just genuinely baffled.
I believe overall he's a hard player to rate honestly, he's a bit of an unusual hybrid which has led to extremes in his evaluation. He can go from looking world class when everything is going his way and the team is super dominant, to Sunday league level. I also think he requires
a lot of accommodating to get the best out of him, and I don't think his best is really worth that effort. I also don't believe he could actually play CM in the long term, as his starting position. He lacks too many tools to be useful. I'd also say he seems to lack top mentality which is a bit of an issue.
So I guess I'd go with "good but not great", but it's not even that straightforward. He's just a bit of a weird oddity.
About as weird as the crazy good press he gets, in my mind.