He has every right to get angry with a company he's doing business with and which provides very bad service. Whatever the reason is. If the current political decisions turn out to render many businesses bad for their customers, I think this is going to be a serious problem. Just saying.
You and everyone else, has every right to be angry with any organisation, for any reason.
But, if the reason is entirely out of that organisations control, and would mean they would be breaking certain laws and/or liable to lose a substantial amount of business, as a result.
That it may not be such, a good idea, blaming that organisation.
E.g. You eat a really nice meal, outside, on the restaurants tables. It then pours with rain, a huge wind blows, a storm brews, and you have a terrible time.
It wouldn't necessarily be fair or nice, to blame the restaurant for the terrible weather.
But, you would be within your rights, to do so (blame them for the weather).