As of 2025, official MW3 multiplayer on Steam is a ghost town of hacked lobbies and 200-ping European search queues. But is immortal. Here’s where you find it:

Patch 1.43 addresses these "dev error" crashes head-on. Early reports from the community suggest that the frequency of and Dev Error 5573 has been significantly reduced. If you’ve been hesitant to queue for a high-stakes Search and Destroy match due to crash anxiety, this patch should offer some much-needed relief.

If you are referring to the phrase "put together" in a more general gameplay context for Modern Warfare 3 or newer entries (like MWIII 2023), it often refers to:

The community's response to the patch has been mixed, with some players expressing relief that certain issues have been resolved, while others continue to report problems. As with any patch, it's essential to note that updates are an ongoing process, and Infinity Ward and Sledgehammer Games are likely to continue supporting the game with future patches.