So I'm about to speed-run Ladder reset in a few days, and my gd game client just keeps crashing. Anytime I switch acts or use portals too often, and sometimes at random.

Pretty much can't chance that happening on reset day, and I REALLY need help on how to fix it.

I did the Mr Llama bs trick with the additional .txt commands way back at first Ladder season. I never updated / reextracted for new patches, but I did remove the .txt command lines. Seems like removing the .txt lines either did nothing or makes it worse.

Anyone know how I can better ensure my client isn't crashing constantly?

Check your router "security level" also check your LAN connection settings

Have you tried updating your drivers? Also you can repair the D2R install from the cog icon near the play button or realm selector.

I would personally remove all d2r data and do a completely fresh install and then update your drivers.