to give a more comprehensive answer; it's the only Soulsborne game which wasn't directed by Miyazaki
the game itself is quite good. it's in the top half of the Soulsborne games, easily. but being the only game in a franchise not made by the main director is a MASSIVE debuff compared to how much fans are going to nitpick and complain about something online. and once the complaining starts, and you already have that negative reputation, it's almost impossible to recover. people who might actually like the game won't even bother to give it a try, and people who have played and liked it will get exhausted from arguing with an endless supply of haters, so they stop bothering to praise the game at all.
demon's souls - great atmosphere, but clunkiest controls and mechanics. while the bosses are very creative by the standards of when it was released, most of them are extremely easy, and only a few still feel 'creative' by modern standards. actually has fast travel, and the standout qualities of this game are still standout, so it still holds up very well.
dark souls 1 - have to walk everywhere and it's a slog. when you finally unlock fast travel, it's not even convenient. several areas are notably bad, some of the worst areas in all of the souls canon, but people conveniently ignore those sections when rating this game due to nostalgia blinders. if backed into a corner, pretty much every dark souls 1 fan will admit that the entire second half of the game is bad. but it's the patrick star meme where even after they admit all of the bad things about dark souls 1, they somehow still claim that it's better than dark souls 2.
dark souls 2 - kept the non-linear feeling of demon's souls while avoiding the trap of open world, and adding more convenient fast travel than any game before it. added more weapons and PVP mechanics than any previous game. has a ton of bosses and areas, and the biggest complaint you usually get are how there are so many "Boring" ones. well, first of all, if you remove all of the boring ones, there's still probably more good areas/bosses in DS2 than DS1 just through sheer volume. secondly, I'd take "boring" over "actively bad" any day of the week. never force me to go through blight town in a game that literally does not have fast travel ever again in my life. please.
bloodborne - a masterpiece by all standards of creation. the only downside of bloodborne is the extremely high learning curve. it's not particularly steep -- blood vials are so powerful that even a complete idiot can beat the game by just healing through everything -- but the gap between the bottom and top is VERY high. it legitimately takes beating the game 2-3 times before you ACTUALLY become good at it, and most people never reach that level, and think the game is way harder than it really is. and never understand how truly great and deep the mechanics are. even with this debuff, it's still commonly considered one of the best games made by miyazaki and one of the best games of all time.
dark souls 3 - completely nonsensical lore, area, and gameplay design. you have a key that is placed on the ground directly in front of the door it is supposed to open (exploration anyone?), most of the expanded movesets from dark souls 2 were dumbed down and simplified, and there are almost no standout areas in this game. if any. several frustrating areas, mostly in the last section of the game, with the duke's grand archives being pretty notably unfun and bad (the decline of the quality of the game starts here, but it's not amazing before that either). after grand archive, it's an extremely fast paced rush to a disappointing ending. the quests are more cryptic and impossible to complete without a wiki than ever before. it has fast travel, probably its main redeeming quality.
elden ring - many things that people like about elden ring, were done first in dark souls 2, but this game was made by miyazaki so people actually like it. open world sucks and riding a horse is bad, but at least they included fast travel this time, so it's much better than dark souls 1. similar to ds2 it has a lot of weapons and more varied movesets. additionally, the weapon arts are more interesting and fun in this game, turning ds3's weakness into a strength. does have some problems, like ashes of war and equipment feeling very 'tiered' as opposed to previous games where things were balanced in a more parallel way. combining this with the ease of dropping powerful endgame items to fresh builds, and it becomes questionable. appealing more to casuals isn't inherently a bad thing. but open world is really, really bad. but the game still manages to be good in spite of that, so maybe it's actually secretly great, just debuffed.
as for why a streamer would skip over dark souls 2; why bother playing a game that people aren't going to watch?
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only less than nothing, as nothing could have equaled you https://i.ibb.co/5skW2Jq/Mado2.png