you cannot agree or disagree with math, it is what it is

At 50% the miner can produce blocks as fast as honest miners and could have an equal length fork

Any more and they can produce blocks faster than the network, so for example if the network produced 100 blocks, they could do 110.

And they could start 10 blocks early, so their chain would still be the tip, same height, but they now undid 10 blocks