What motherboard do you have? The Intel nic has had problems dropping randomly, it could be that.

https://www.anandtech.com/show/18755/intel-shares-stopgap-solution-for-intermittent-connection-drops-on-700series-motherboards

I don’t see anyone asking about your cooler solution and what your cpu temperatures are. The 13700 can run hot, which can impact its performance.

Are you just gaming, or running a cpu intensive program? Gaming some people get away with an air cooler. If you want to maximize what it can do, get a contact frame and at least a 360mm aio.

The Meg has an Intel ethernet chip. I wouldn’t want that. The z790 steel legend isn’t much more.

https://pcpartpicker.com/products/compare/RkRYcf,y9bTwP/

Z690 has limited ddr5 speeds.