How do you not filter out those who aren't subscriptions? For instance my best buddy in high school. I know hundreds of people whom I would be happy to receive email from. They aren't really subscriptions.
I really wanted to like fish but it is so difficult to get it configured the way I would want to use it. I tried so many different ways and the barriers were just so high. It should not be so difficult to make a tool work the way I wanted to work.
I'm typing this on my Google pixel 6A using grapheneOS. I've been very happy with results. There have been a couple of friction spots, but nothing I've not been able to work through. The installation was remarkably simple.
I don't mean Scrum, I mean that people believe the this is Scrum.
Sprints DO have a break. The morning of the first day is just about figuring out what threat will look like. The afternoon of the last day is everyone talking about what they did during the Sprint. That is a full day of doing no coding and just talking with each other about the work. Every two weeks. If someone is forcing you to work in different way, then that's not Scrum.
The dev team is supposed to be encouraged by the scrum master to only take on the work that they can finish during the upcoming Sprint. If they take on too much work the answer is not to insist that they finish it but to ask what they need to understand better about their work. If someone is insisting that the Sprint backlog absolutely must be finished every Sprint, they aren't doing Scrum. As a corollary I hope no one is trying to insist that you do a release that coincides with the Sprint schedule. That's not scrum either.
Scrum is based on principles developed in the Toyota way. There are two pillars in the Toyota way, continuous improvement and respect for people. I'm sorry it sounds like you not lived with either of those pillars. I hope you find a scrum master who understands and can encourage this type of development.
By the way, I am a scrum master myself and this is how I treat my teams. I choose to trust them every time. And I encourage them to make good healthy decisions for themselves.