I normally get lag/disconnect issues in COH2. But those are all network related. Do you get the Server disconnected messages? My ISP connection outside the house has been questionable.
You stated you are wire connected to your router. You could try WiFi to rule out your network cable or its connection to the network card. You can get a wireless USB adapter for very cheap for testing. When I would have disconnect issues my internet still appeared to be working. But I am guessing it was intermittent and would cause COH2/Server to get confused. I created a WiFi hotspot with my phone and never had disconnect issues on my phone.
OTHER THOUGHTS
If your screen is freezing that sounds like a hardware issue. In the old days hardware would freeze up and you had to reboot. Now CPUs may declock themselves and cool off and possibly return to working. Or your GPU may sense a software issue and reset the card/software. I imagine most of those scenarios would result in COH2 crashing. Which you are not seeing. The only hardware you have not changed is your GPU. Drop all settings down low and see if it runs? If your PC is in a high humidty area such as a basement I have seen some issues with oxidation on the Ram connections that caused weird issues. But that is rare.
If you have two monitors you should have Task Manager/resource monitor open on the other screen at all times to see if your CPU or Hard Drive spikes etc. An SSD has much better seek times than a traditional HDD so heavy HDD traffic should not affect you as much.
It gives me the "connection lost, reconnecting succesfully reconnected" sometimes. Like 50% of the times, so that's weird too.
Maybe my dad has a usb adapter, i'll try that out. I'll also try another internet cable, as the one im using right now has been flat together a few times now by my door haha.
I'll also drop my settings low and see if it still works then. If it does work then it's my gpu who can not handle my settings, right?
No, my pc is not in a basement so we can cross that one of the list

I have one a little bit older ssd and one new ssd. I'll try the task manager thing yes.
Thx for the advise!! I'll post back here when i've tested all those things, first reinstalling coh2 again now. I really appreciate your help guys
