Your log is incomplete but I suspect you have Rendering Lag/GPU overload.
Run only (1) monitor @ high refresh rates. The other should be set @ 60HZ. This will save resources. Personally, I would drop that main monitor to 120HZ for testing. If things look better, then go to 240HZ, do not use 280.
Next, turn off HDR & then run another test.
06:34:47.607: output 0:
06:34:47.607: name=MO27Q28G
06:34:47.607: pos={0, 0}
06:34:47.607: size={2560, 1440}
06:34:47.607: attached=true
06:34:47.607: refresh=280
06:34:47.607: bits_per_color=10 ---> Disable HDR
06:34:47.607: space=RGB_FULL_G2084_NONE_P2020
06:34:47.607: primaries=[r=(0.690430, 0.308588), g=(0.237303, 0.716804), b=(0.151361, 0.040039), wp=(0.313473, 0.329098)]
06:34:47.607: relative_gamut_area=[709=1.524957, P3=1.124154, 2020=0.806505]
06:34:47.607: sdr_white_nits=300
06:34:47.607: nit_range=[min=0.080000, max=390.000000, max_full_frame=380.000000]
06:34:47.607: dpi=96 (100%)
06:34:47.607: id=\\?\DISPLAY#GBT273C#5&3a1fce67&0&UID4357#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}
06:34:47.607: alt_id=\\.\DISPLAY1
06:34:47.608: output 1:
06:34:47.608: name=MSI MAG241C
06:34:47.608: pos={-1920, 0}
06:34:47.608: size={1920, 1080}
06:34:47.608: attached=true
06:34:47.608: refresh=144
06:34:47.608: bits_per_color=8
06:34:47.608: space=RGB_FULL_G22_NONE_P709
06:34:47.608: primaries=[r=(0.676758, 0.314453), g=(0.285156, 0.651367), b=(0.148438, 0.075195), wp=(0.313477, 0.329102)]
06:34:47.608: relative_gamut_area=[709=1.212371, P3=0.893725, 2020=0.641187]
06:34:47.608: sdr_white_nits=80
06:34:47.608: nit_range=[min=0.500000, max=270.000000, max_full_frame=270.000000]
06:34:47.608: dpi=96 (100%)
06:34:47.608: id=\\?\DISPLAY#MSI3EA2#5&3a1fce67&0&UID4355#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}
06:34:47.608: alt_id=\\.\DISPLAY2
06:34:47.609: Loading up D3D11 on adapter NVIDIA GeForce RTX 4070 SUPER (0)
06:34:47.822: D3D11 loaded successfully, feature level used: b000
06:34:47.822: DXGI increase maximum frame latency success
06:34:47.822: Hardware-Accelerated GPU Scheduling enabled on adapter!
06:34:47.822: D3D11 GPU priority setup success
06:34:47.922: ---------------------------------
If things still aren't right, disable Avast & HAGS. Try again.