1. Update your Windows 10 to 1909 or 2004 if available per
https://obsproject.com/blog/five-simple-tips-for-new-streamers
2. SLI/Crossfire Capture Mode (aka 'Shared memory capture') is very slow, and only to be used on SLI & Crossfire systems.
If you're using a laptop or a display with multiple graphics cards and your game is only running on one of them, consider switching OBS to run on the same GPU instead of enabling this setting. Guide available
here.
3. Your log contains no recording or streaming session. Results of this log analysis are limited. Please post a link to a clean log file.
To make a clean log file, please follow these steps:
1) Restart OBS.
2) Start your stream/recording for about 30 seconds. Make sure you replicate any issues as best you can, which means having any games/apps open and captured, etc.
3) Stop your stream/recording.
4) Select Help > Log Files > Upload Current Log File. Send that link via this troubleshooting tool or whichever support chat you are using.