190 mega-bits per second is pretty good. That’s 23.75 mega-bytes per second.
As a comparison 4k video streaming demands about 25 mega-bits per second.
Are we saying that MSFS draws such a huge amount of bandwidth? That seems quite excessive but I guess it is pulling ground mesh and textures continuously.
I’d say that stuttering is more likely to be caused by your disk drive trying to write all that data into a cache or writing huge amounts of data to a swap file perhaps. Total guess. I switched off my rolling cache because I’m never fly the same.place twice. I get fewer pauses and smoother frame rates. Less crashes too. Maybe worth a try?