First, let me say I don't condone any remonstrating with the refs, but as long as it's tolerated by the league, it will continue to happen. That done, he has a massive point - Kane should have been sent off, and Emerson's challenge on Jota was a stonewall pen. We massively lucked out that neither was given. It's a problem with the game that many newer referees never grew up playing the game to any sort of a decent level. When you've played the game, you recognise things on the pitch that others who haven't done so do not. Last, it's always the winning managers who get stick for giving out to refs. Opposing fans all hate it, but I guarantee his players and the fans love him for it as he's always sticking up for them, no matter what the circumstances.
I get when people say this, but the amount of work it takes to make it to the PL means you have to decide pretty early that you're better off reffing than playing. And they players who did make it to a decent level don't want to ref EFL games for 30k a year while working a second job.