Looks good in obs but poor quality in youtube streaming

[kalavaraboomi]

looks good in obs and bad in youtube , playing fornite in ps5 and using pc for streaming.
My 2017 Rig:

Ryzen7 1700
Wraith Spire
Msi B350 Tomahawk
Gskill TridentZ 3200mhz 16gb(8*2)
Zotac rtx 3070ti
Capture card elgato 4K60 Pro mk.2
WD Black 1tb 7200rpm
Samsung SSD EVO 850 240gb
ADATA XPG GAMMIX S11 Pro 1 TB M.2-2280 NVME Solid State Drive
Corsair RM 650 W 80+ Gold Certified Fully Modular ATX Power Supply
Gigabyte ‎M28U 28.0" 3840x2160 144 Hz Monitor - (connected with ps5)
LG 22MP68 22" Full HD IPS SLIM LED MONITOR (1920x1080) - (for streaming)
win10 pro 64bit

Obs settings

target streaming 1080p
My video quality in youtube

please check full video, the more vegetation the more choppiness in video.

My internet speed

since 2022 july I am trying to solve this issue, I was using RX 480 GPU till december end, becuase of this issue I upgraded to Rtx 3070 ti , still facing the issue. please help me, I feel wasted buying new GPU.