It’s easy. W is a vowel in Welsh. It sounds similar to ö in German and it can be modified as ŵ to elongate the sound such as in the word dŵr which means water.

Wrwgwai or Wcrain (for example) are the natural way to spell those countries using the Welsh alphabet. Its a highly phonetic language believe it or not.

Not sure I agree with you that it was that bad, but I love the strength of your reaction.