The EU isn't exactly known for being Kremlin propagandists. Here is the link to the 700-page international fact-finding report they published in 2009: https://www.echr.coe.int/documents/d/echr/hudoc_38263_08_Ann...
This Radio Free Europe article is a decent summary of the report: https://www.rferl.org/a/EU_Report_On_2008_War_Tilts_Against_...
Why do you think the international team of Europeans would leave out something like an August 1st attack by Russian forces? Why would the US-funded media outlet for Europe (RFE/RFL) parrot the report's position that the conflict was overwhelmingly Georgia's fault?
"The Mission is not in a position to consider as sufficiently substantiated the Georgian claim concerning a large-scale Russian military incursion into South Ossetia before 8 August 2008."
Can you share the evidence you have that supports your position that Russia attacked on 01 August? The EU concluded that was unsubstantiated.