My honest opinion is that the game was passable, which is a shame. I wish they did more with the story and they did more to make the side activities more fun. They aren't. They are very general and there is way to much fetching.
I wish they focused the story on how the boss meets Neenah, Kevin and Eli instead of having them already be friends. I think it would've been better if the Boss was part of the Marshalls for a longer set of time. Just spitballing, but imagine if the boss was already part of the Mashalls for a while, maybe even a higher rank. Or maybe you start out as a rook, but your actions make you grow through the ranks faster, causing more competition with Gwen, which could be a fun thing to explore. There are 3 gangs ruining Santos Ileso and a bit like now, Neenah, Kevin and Eli are eacht part of one of the gangs.
In your missions to uphold peace (and abuse your power as a PMC) you meet the three, and every mission, you help eachother out. Starting a friendship individually. Then the boss brings the other three together and they find a liking to eachother. So the Marshalls in the meantime are getting more brute and start to blame stuff on the boss, like the failure of their missions. They are also needlessly brute against other gangs, bringing the Boss, Neenah, Kevin and Eli on the idea to bring all gangs together.
So they start to work towards that goal, but things fall apart, the gangs betray the three friends and the Marshalls betray the boss. So then they decide to start their own gang, the Saints (with a little joke that one of them heard the name somewhere before, but couldnt place it, leaving it open to a crossover when the series start to get more crazy) and they can finally start some work, unlocking the last of the missions to take over the city.
Anyway, what I'm trying to say is, the story was very generic, could've used much more work. The sidemissions were mostly boring. The bugs destroy the game, I can't play coop because of many bugs. And I have no motivation to 100% this game, something I had with Saints Row 2, 3 and 4. I do wish they will return to their edgy, over the top humor. That they will parody other games and point out their ridiculousness while being ridiculous themselves. That they come with more fun activities. Bring back Fight Club, more transporting missions, racing, Fuzz, Crowd Controll... I mean, they have so many examples from their previous games, there is no excuse for this game to be an average open world game. Even Far Cry 6, the most basic open world game from UBI feels more fun. Which is a damn shame.