I don't get all the Kane love here. In the "Unpopular Wrestling Opinions", I said that he was overrated. The character has been booked so badly over the years and Kane is not that great in the ring.
What are Kane's best career matches? The only really good match of his that I can think of is the TLC match they had on Raw in 2002, and that match was helped by 6 other guys. He has solid matches when he's with the right opponent, but has he ever been in a match of the year candidate? I don't think he's anywhere close to being the best big man ever.
I think it's your expectation of him TBH. You can't expect something like a MOTY from a guy like Kane. He's very steady though, and has an extremely versatile character.