The Rams are not playing good football right now.
It's not simply injuries but injuries are a big factor.
It's not as simple as the number of injuries, it's the quantity of injuries at two positions.
The Rams top-5 interior OL are all out. That's the three starters, and top-two-reserves. The interior-OL-starters last night were the Ninth-OL (last OL on the 53-man-roster), the #3 OT and a player that is not even on the 53 if everyone is healthy. This has a major impact on the running game, play-action-game and pass-protection up the middle.
Three-of-the-top-four CBs are out. They all pretty much were injured at the same time. The 5th CB (Kendrick) was not even game-day-active before the injuries. Another player not on the 53-man-roster when everyone is healthy, is the current nickel-CB. This has a major impact on how the Rams are playing the pass.
If the Rams did not have this quantity of injuries at these two positions, Evans, Kolone, Kendrick and Haley are probably not even in uniform on game-day. Jackson is game-day-active to serve as the 3rd-OT.
And, again, injuries are not the only reason or factor.