Problems with ping - urgent bugfix needed

Dear Community and most of all Game-Development!

I keep finding many Online Games (~5 out of 10) with ping > 450ms. The Game then is unplayable since the delay is just to big. My Internet connection is all fine. I tested that.
How to reach Blizzard Support for such reasons? I was not able to…

What can I do to only find playable Games with lets say ping <250?
In “Warcraft classic” I never had that problem.

I had to leave 9/14 Games due to this reason today.
That needs to be fixed.
@Blizzard: your Game has become unplayable.

Looking forward to hear from you soon.