1. Your gigabit-capable network card is only connecting at 100mbps. This may indicate a bad network cable or outdated router / switch which could be impacting network performance.
2. Stream with a wired connection, change server.
3. Disable Hardware-accelerated GPU Scheduler.
4. Enable Game Mode.
5. Binding to a manually chosen IP address is rarely needed. Go to Settings -> Advanced -> Network and set "Bind to IP" back to "Default".
6. At least one of your audio devices has a sample rate that doesn't match the rest. OBS Sample Rate set it to 48000 Hz.
7. Disable Psycho Visual Tuning.
8. Set profile to High instead of Main.
9. Limit your fps in game, lower your settings, disable obs preview.