I’d rate US ATC services as similar to many 3rd world country ATC services. Their use of non-standard RT, lack of empathy with non-english speaking airline crew, ridiculously fast speaking and unnecessary visual approaches for long haul airliners causes unnecessary extra RT, go-arounds and incidents.
You obviously haven’t been to LHR. Now, that airport definitely has the best ATC services in the world. And guess what, it’s limited on real estate, maxed out capacity wise and doesn’t need the use of visual approaches to achieve that capacity.
Yes, LHR and LGW also provide great ATC services but to call US third world? .... pompous perhaps?
US ATC expects professional pilots to be competent, proficient operators. If you pay attention to how some of the "questionable " Asian operators are handled in the US, you'll see that Cathay Pacific gets treated the same as most domestic airlines because traditionally, CX hired experience. If CNs are willing to sit and watch their 130hr Adelaide brushwingers butcher a visual, they can do the paperwork and soon enough, Cathay will be positive speed control from 100 miles back and 20 mile finals alongside most of our Asian counterparts.