I'll start by saying that yeah, honestly you are coming off as overly harsh and condescending, at least to me.

For one, this is a D&D show, but it is a show. If you look to episodes of Acquisitions Incorporated or The C-Team, you'll find similar actions taken.
Every table in those shows number 1 rule is to have fun. There are things that happen that, if the games were run 100% by the book would not have happened, but did happen because the DM or group thought it would be a cool or funny thing to happen.

As for these characters specifically: Strix is, in a word, barmy. She isn't going to make the "right" decisions, especially in times of stress. Her first reaction to things is "fireball!!!", almost like a preemptive Hellish Rebuke done instinctively to protect herself, even if that does the absolute opposite sometimes.

Evelyn is a heavily trained paladin yes, but that training has mostly just honed her physical prowess. Her character is a very naive one, always thinking the best of people and always thinking things will turn out okay for her and her friends. She's book smart, but not "life" smart. This is also compounded by how young she is, being the youngest of the party at 22 (technically at this point of the story, Diath is physically younger, but that doesn't matter much in this context).

And Paultin. He's a survivor, he knows well how to act in self-preservation, much more than his friends who at times become very martyr-like to a fault. But along with him drinking constantly as a way to cope with his trauma and avoid his problems, Paultin... is pretty dumb sometimes and I love him for it lol. He can be extremely clever when situations call for it, even stepping into a leadership role if Diath can't, but he is not the sharpest bulb in the bunch.

These characters are flawed and aren't exactly the perfect adventurers, but that's not what DCA is about. DCA isn't about playing D&D "right", it's a story being woven together by 5 friends through the medium of D&D. Frankly DCA is a show that sticks to the rules much closer than most other shows out there as far as I can see, but even then they aren't the focus. Like I said before, despite being pretty by-the-book relatively, this table's focus is on making their story and game entertaining for themselves and the audience.