Going back to the premise of this thread, I don't actually think he's shit, but I think the team has reached its ceiling with him.
I recognise that since he took over, there have been a lot of positives:
- the relationship between the team and the media is a lot less toxic than it was in the past; he's had a soft touch approach with the media that I really appreciate, it's open, genuine, and not unnecessarily conflictual, which I'm sure has helped the team a lot
- put an end to the silly club tribalism when the players join the camp
- created a positive environment, in link with the above - you can tell from interviews by the players that they enjoy being together and playing as a team, which is great
- trusted quite a few young players, and picked them up if they ever failed
But I just don't think he's the guy to take us to the next level - I feel he sometimes contradicts himself between his public stance of playing "in form players", and in practice trusting the tried and tested (and boring) ones. His in-game management is poor. While he's created a positive environment, I don't believe he's instilled the belief in these players that they can go above and beyond - it feels like doing well and failing well is good enough for him.
His approach to football is also quite boring in big games (and more often than not, has been in smaller games), and he doesn't know how to properly utilize creative players (Foden, Maddison, overly relying on a boring Mount in a creative position). People want to downplay this current crop of English players, but there are a lot of super talented players there (not necessarily world class, but very talented), especially in the attacking positions, and we're usually incapable of producing pleasant football - for all the good moments, and general domination over France, we didn't have that much to show for it, which is often the case. Lots of work, lots of effort, little flair.
I feel he's taken this team as far as it could go with him, and his overall legacy would be decent to good if he left now, and importantly I feel he's built a platform for someone better than him to take over and propel the team that level higher (which would probably lead a lot of us to revise his legacy a posteriori to great, rather than just good). I'm not sure who that is, it's not my job to find the next England manager, but I'd be love to have someone of a higher caliber taking over this team.