A lot of people are really bad at making slide decks, and PowerPoint often is the lazy presenters tool of choice, so it falls on the sword.
When I was last leading a team we prepared extensively for our demos. We used PowerPoint, as everyone did, but we reviewed the deck several times as a team, moving things 1 pixel this way or that way to make sure everything was lined up perfectly. If someone was getting into the weeds, we’d pull them out. If someone was talking about what they did instead of how it related to the user, we’d redirect their focus to make sure the presentation would be meaningful to the audience. If we were handing off between people, we’d practice that so it was smooth without and fumbling or people not knowing how to share a screen. We would spread this out over 3 separate meetings with time between for people to tweak and tune their parts. We’d also be thinking about the demo at the end of the sprint during sprint planning to make sure it was something we could show, and we collected what we needed along the way to show the value.
The end result was really positive feedback from everyone and even after a year our demos were very well attended. One manager with 30 years in the company showed up to one of our demos and said it was the best presentation he had ever seen at the company. The little things really matter to give a good impression at the end of the day.
When most people make a slide deck, they are doing it as an obligation to check a box, and it sucks. In my view, if we couldn’t properly explain to our stakeholders what it is we did and why it mattered, we might as well not do anything at all. Those demos were our public image to the organization and that was how people would see and judge us. In many ways, the demos mattered more than the work itself, and needed the same care (or more). Much like people judging the cleanliness of a restaurant’s kitchen by how clean the bathrooms are, the quality and inner workings of the team are judged by the demos. Lazy PowerPoints are indicative of issues throughout the team.
My current team (I’m an individual contributor on it) has garbage presentations put together by a lazy person, and it shows. I hate it. No one really knows what we do, and someone just got laid off for failing to properly explain the value of what he was working on to leadership. Poor presentations, and direct leadership not making this a priority, cost him his job as far as I can tell. Prior to the layoffs, he was very outspoken about our lack of quality demo and tried to champion making things better, as did I to some degree, but we got zero support, and I was explicitly told not to step in and help.
So yeah, it’s not PowerPoint, it’s the people who are being tasked with making most of them and their mental framework behind what they’re doing.