Mate, he was playing for David Moyes at perennial relegation candidates WHU. He's a class football player, not God.
Against tougher opponents, he was exclusively played as a CDM, so it's understandable that his full array of skills weren't on show when he was busy chopping trees.
Internet speculation is that City would still be interested at £25m. As a 27 year old Rodri back up, with proven PL experience, I'd be open to the possibility if it could be proven the betting issue hasn't broken him mentally.