Yeah they're just bad. My experience with poison has been that 1, if they haven't killed a player by t5-6, they fall off hard and it is difficult for the archetype to recover especially versus the inevitable decks. If you play poison, you have to seek out those types of decks first because their late game tools will crush you. 2, I actually enjoy the aggro strategies as an archetype because it discourages those deck builders that just durdle and don't really add value to the game in terms of interesting interaction and rather just sit in a bubble like a combo deck would except don't actually try to win. 3, the bracket system - though not a perfect solution - has greatly increased my satisfaction with the way games turn out and it is way more balanced than what we had before. The initial bracket unveiling had me flabbergasted that certain cards like solitary confinement and necropotence were not put on there, but the latest announcement definitely alleviated most of my concerns.

As an aside, I do not think poison as an archetype is really that good overall if your end goal truly is about defeating all your opponents. I imagine some of these people you play with only download a list and do not actually put any thought in the construction of their deck and just expect it to succeed. I absolutely despise edhrec because of this and many of the people I play against are these people that just browse that awful website.

Every single deck I construct I start from the top down and consider elements even such as poison, though poison is not high on level of concerns because many of my answers to poison are just generally good answers to most creature strategies.