Unfortunately the logfile you uploaded does not contain any recording/streaming attempt output...
Can you do a few minutes' worth of recording/streaming (Doing what you would normally do in-game) then stop the recording/streaming session, then upload a current logfile please so I or someone else can further assist in troubleshooting:
https://obsproject.com/forum/threads/please-post-a-log-with-your-issue-heres-how.23074/
In your logfile I noticed you have Windows GameDVR enabled. This may be a cause of the performance issue as even when you are not using it, just having it enabled in Windows settings it will always hook into the game process and commit resources (Similar to what OBS does when OBS is open, though more aggressively as it also buffers for replay recording)
Also, in your logfile I noticed you have in your PUBG scene two conflicting capture sources:
Monitor Capture
Game Capture
You should remove the monitor capture source from this scene as it relies on your system RAM to grab the frame, which is far less efficient than the direct hooking method used by game capture.
Game capture grabs the frame directly from the graphics card for OBS to encode before sending it back to the graphics card for final rendering of the frame.
Monitor capture has the graphics card write the frame to system RAM before OBS grabs it to encode, then sends it to the video card to render for final output.
