I want to preface this with that Britain has a large non white migrant population who face far more violence than white Welsh people ever do at the hands of institutions, the police, the press and so on.

Welsh people are absolutely treated with downright mockery at the best, and hostility at worst. see the typical tropes of it is ofc calling them 'sheep shaggers' and such, but it's where this is translated into the political realm that denies Wales further autonomy, has Wales slide further into poverty, and the attempts to erase Welsh as a language and identity that this is a form of violence.

the Welsh government does a lot more for their people than most English MPs do, but that said Wales has been hit HARD by post industrialism. they were receiving huge EU subsidisation for local business, which is now gone, furthering that post industrial slide with mass unemployment and social decay. Swansea and Cardiff aren't anywhere near as bad in terms of jobs in being big towns/small cities so you have a lot of service industry jobs, but it's still not a lot.