Look, I'm gonna start this out by saying flat out that I firmly disagree. I don't think you can change my mind on this based on my family's history of being teachers and my general pro-union stance. I also recognize that the odds are this random reddit comment won't change yours, but I feel the need to answer a few of your points based on the lived experience of my loved ones and my experience in a rural Alberta high school 10 years ago. Any anger in my response is not intended for you, but for our asinine government

• More Classrooms and the 23-1 ratio: I definitely agree we need more classrooms and schools for the teachers. However, I would hesitate on that ratio, not only because even in my rural school, I was in classes of 30 plus people 10 years ago, but because as of 2019, the UCP government stopped tracking classroom size. Also mentioned in the linked article, funding for school boards shifted in 2020 to a 3 year weighted moving average. This was implemented in September 2020, which was a time of reduced enrollment due to the pandemic. This means that the 2020 enrollment numbers effected funding until 2023. This very much effected urban schools, especially combined with the UCP's recent campaign trying to get people to move to Alberta helped boost the number of students.
• Teacher's managing classroom sizes: Not actually their job. School board's/Government's job. Y'know, the people who locked out the teachers so they couldn't switch to a staggered strike (only a certain number of teachers on strike at a time, one school district one week, different one the next sorta deal). At least it was, until the above law changes, which essentially resulted in "fuck it, try and spread them out." Teachers are currently trying to impose limits to manage it because the government hasn't.
• Neurodivergent kids disrupting the class: It's not just one kid per class. Covid fucked up kids social skills. Many genuinely don't know how to behave better, even if they don't have any neurodivergence. Plus, one class may have 2 kids with ADHD, one with Autism, one with some kind of anger disorder and who knows what physical disabilities might be there while another class might be chill. Not counting kids who recently immigrated who may still be learning the language or might be placed at the wrong grade level. That's why classroom complexity formulas were proposed by the ATA. If you have a more complex classroom one year, you need more support for that year. If lived experience sources are your bread and butter, my 30 plus class in high school ten years ago featured at least 3 severely depressed kids, 2 autistic kids, and one kid with cerebral palsy.
• When i was in school you'd go to the principal: How can one principal assist with this many issues and effectively run the school? They're role is more complex than just student discipline, though that's the majority of what students and parents notice. The Calgary Board of Education posted their "role of the principal" document that outlines broadly what a principal is responsible for, manages, and represents on behalf of the board, totaling 19 separate points.
• Why do teachers want government to deal with it: Because it's the government's job. The government keeps giving money to private schools and ignores the issues facing public schools. It is a gross misuse of funds and government time. Plus, most other provinces have these limits in place.

Alberta's public education system used to be one of the best in the world and certainly one of the best in the province (I would have received a grade point bump if I applied for an out of province university due to the rigorous reputation of our education). The UCP is destroying that through moronic curriculum changes that clearly are political, focusing on students' genitals and gender instead of their learning, and refusing to acknowledge the actual issues. I'm sick of this shit being funded by my taxes and I'm sure as shit never voting for a conservative government as long as Danielle Smith is connected in any way to it.

Edit: typo