He was only "awful" as a team player to anyone who was determined to see him in a bad light, as you quite obviously are.
His all round game certainly wasn't as good for England as it usually is for Spurs. But you might say the same about a number of players - Sterling included - who were not played for England in the way in which they are most effwhat a load of bollocks. If you want to come in on a conversation , at least understand what is being debated ectively employed for their clubs. Nevertheless, Kane still contributed a lot to the team.
Quite apart from the 6 goals, we shouldn't forget that he earned two of the penalties himself and should have earned two or three more had refs / VAR done their job. He consistently won fouls, either when England were under pressure or when - as happened far too often - he received the ball but was isolated up front, with no support. He won his fair share of headers and flick ons. And he made a number of telling passes that weren't capitalised on. As to your casually dismissing the penalties, that simply demonstrates either bias or ignorance. They were very well directed penalties, taken at moments of great pressure.
As to Kane losing England the semi final, that's one interpretation, certainly - if you're the kind of person looking for a scapegoat and unable to set club rivalry aside. For that matter, though, you might just as easily say that John Stones and Harry Maguire lost England the game by switching off and leaving Mandzukic alone in the box to score the winner. Or you might say that Kyle Walker lost England the game by allowing Perisic to steal in front of him to score Croatia's equaliser. Or you might say that the England team as a whole lost us the game by raising the white flag of surrender to Croatia's high press and abandoning any attempt to retain possession. Or you might say that Gareth Southgate lost England the game with a number of questionable decisions - most notably that to take off Sterling so early in the game.
It all depends on how blinkered and bitter you wish to be. Me? I prefer to congratulate the players and manager on a decent effort but to concede that, ultimately, they are neither collectively nor individually good enough at the moment.
