Was that gigabyte’s answer to your rma request?
If that’s the case you should follow up while playing dumb like “it got worse. every game crashes after 2 minutes”. No need for specifics, just exaggerate the symptom a bit.
High junction temp indicates wrong cooler contact or paste dry out. You can’t fix those without damaging your “warrany void” sticker.
The draft is pretty good. Only a few points to consider changing: