Try with OptiFine_1.16.4_HD_U_G6 with Forge 35.1.36.
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Say something silly, Laugh 'til it hurts, Take a risk, Sing out loud, Rock the boat, Shake things up, Flirt with disaster, Buy something frivolous, Color outside the lines, Cause a scene, Order dessert, Make waves, Get carried away, Have a great day!
pastebin
Downgrade Forge to build 35.0.1
then many mods will not work
Test it without Optifine
Try with OptiFine_1.16.4_HD_U_G6 with Forge 35.1.36.
Try installing OptiForge.
it didn't help
Add the new report
crash
Replace Optifine with this version:
https://optifine.net/adloadx?f=OptiFine_1.16.4_HD_U_G6.jar
crashes anyway
crash3
You are still using the wrong Optifine version
Go to your mods-folder and delete
OptiFine_1.16.4_HD_U_G5
Download the current version: HD_U_G6
https://optifine.net/adloadx?f=OptiFine_1.16.4_HD_U_G6.jar
thx