There does seem to be an anti-English/British sentiment in my opinion. The likes of Shaw, Maguire, AWB, Rashford and McTominay (Scottish, I know) have taken dogs abuse and called all sorts of names over the last two seasons, whilst very poor/non-existent performers like Eric Bailly, Anthony Martial, Donny van de Beek, Fred and Diogo Dalot seem to enjoy large pockets of support and are generally seen in a favourable light and/or portrayed as having being treated unfairly.
To be clear....I wouldn't say it's malicious or based in xenophobia/racism at all, I just think there are a few factors behind this...
1) We have a global fanbase. Many of our non-British forum members will naturally rate their league/'their' players higher than non-natives. Plus there is the natural tribalism that comes with supporting sports team i.e. "our lot are better than your lot".
2) Many posters seem to feel that English players get an easy ride in the press*
3) English football fans/media are generally perceived by non-English football fans to be arrogant/deluded - 'it's coming home', 'best league in the World' etc...and therefore have a general dislike of English football/players/supporters/press
4) The club seemed to openly pursue a policy of signing British players under Solskjaer, which led to some supporters labelling us 'Brexit FC'. It was perceived by many that Ole favoured the British players and therefore as Ole's popularity waned, this was used as a stick to beat him.
5) Certain individuals have fuelled the fire by claiming English players are preferred at United, despite there being little to no evidence for this (Eric Bailly)
There are definitely other factors at play here and it's a controversial subject for sure...but it does seem to me like some posters want certain players to fail, and I find that bizarre.
*on the point about the British press...I would say I strongly disagree that British players are treated favourably. I would say that the British press do love to build a player up quickly but then they love to tear them back down twice as fast!