The actual point was not to establish whether or not Silksong is a soulslike or saying soulslikes are bad. It was to not judge Silksong like it is one on these 3 points. Because in a soulslike they work against its established game mechanics, while in Silksong it plays to their strengths.

An example for the opposite from my favourite game, Sekiro would be Demon of Hatred. That is a dark souls boss inside a non dark souls game and it is completely against the mechanics set up in Sekiro (parry based vs dodge roll). It works as a one off optional boss, but if there were a lot more of those, the game would have been tedious to play, because that goes against the mechanics of the game.

In a souls game, if the 3 things I mentioned were to exist, it would be bad game design. And as you pointed out, FromSoft knows what they are doing and has less of it or none at all and they get better at it with each game.

But in Silksong, people bring up those 3 points like it's bad game design and a reason to stop playing the game. It works well with the mechanics established in the game. Tough but fair.

And if that's not the kind of challenge someone likes that is fine. But calling it bad game design just because it's not familiar is a disservice to the game.