No, as lots of other people playing on the US server are not affected, it would tend to suggest that the issue is with a network node somewhere between your house and Blizzard’s US servers that isn’t part of the route between your house and Blizzard’s EU servers. That’s why there’s a stickied thread at the top of the forum…
…so, carry out the suggested WinMTR Test and post the results which will not only show which nodes your traffic is going through, but also the latency between nodes and any packet loss.