My understanding is that EU regulators had an issue because Windows Defender rolled out kernel mode/kernel data protection, which gave Microsoft a de-facto monopoly in that market segment if no one else was allowed to use the same technology in their products.
Microsoft complaining that the Crowdstrike incident was the EU’s fault is an argument in favor of a Microsoft monopoly, which the EU has been pretty consistently against, and EU opposition to this should not have been a surprise to Microsoft.
Starbucks does not directly support the RNC. But that doesn’t mean that Starbucks’ lobbying money doesn’t primarily support Republicans. Per the PDF you linked, the majority of Starbucks’ contributions to lobbying organizations went to those that donate at least 75% of their lobbying to Republicans.
From your link: National Restaurant Association: 75% of all donations to Republicans; 50% of Starbucks’ donations to this organization went to lobbying Business Roundtable: “75 percent of donations from the median chief executive were directed to Republicans”; 40% of Starbucks’ donations to this organization went to lobbying
Edit: Added the word “lobbying” before “money” in the first paragraph. Should have been in the original.