This game had all kinda of problems, but problem #1 was releasing on epic games with 0 hype. At least with a wider release they could have secured a decent launch.
It wasn't published by some rogue and inexperienced entity. Accepting Epic's offer meant that it beat the projected sales figures. The game also ended up being a top seller on Epic, possibly adding to that revenue. On Steam, a negative score would likely bury the game, though we can only speculate.
Yeah since they explicitly say performance met mangement expectations, I suspect they knew ahead of time that it's going to bomb, so they took Epic's money and thereby guaranteed some monetary return at least.
It's a shame, because while I loved SR3 (and enjoyed SR4 and even GOOH albeit I could not stand playing as Johnny), Agents of Mayhem and now the new Saints Row showed that not only is the humor outdated by modern standards and they didn't know how to modernize it, they also couldn't even properly recreate the actual humor the way it was.
The issue with SR Reboot is that they did try to modernize the humor, they went and dove head first to new style of humor and it clearly didn't work for them.