I disagree. I really love having multiple protagonists and having them interchange perspectives. It allows the player to make complex choices and lead to a more variable experience. It lets you see how your choices impact other characters and from another protagonist's perspective. The same conflict can be seen from different perspectives and can offer the player a more nuanced experience as opposed to only having one character to follow. This theme is the embodiment of having choices and consequences that comes with playing a game. It also allows for replayability. THIS is the edge that games have over other forms of media such as novels or films.
Of course, this also makes it a lot harder. It's one thing to have meaningful choices that lead to significant changes (a lot of games here are linear, making the "choices" feel fictitious or insignificant.) It's another to have multiple protagonists that let the player make varied choices from those characters, choices that interact and impact one another and lead to consequential changes to the plot. So this method of storytelling is so daunting and complex in comparison to just having one protagonist. But if done right, it would be one of the best experiences that a player can have over a game that depends on making choices for a character to advance a story.