Just google "Huawei intellectual property" and you will have many, many answers for that question. And it doesn't even end there but they are the kings of IP theft.
US corporations have been outsourcing their activities to Asia with one single aim, profits, for many decades. Is China to be blamed for it? Why do you think after so many years of manufacturing, project management at different layers and also research on their own territory, they don't have the tools to be just as capable as the US to produce their own products without external assistance?
And if the US was that advanced, why is it so behind in 5G technologies? Huawei is bad as Huawei is 10 years forward of everyone else in the field. Free market rules, right? Like those in Libya, Iraq and Afghanistan? Oh wait, Venezuela is still dictatorship, let's bring "democracy" there too and get the "international community" guard the private oil wells of Chevron, BP and Royal Dutch Shell while getting locals back to the Bronze Age with tribes fighting with each other like in Libya now. True democracy and advancement, right?
You remember all the great German, European and even American brands from the second half of the 20th century manufacturing TV-sets? Where are they now and who owns them? Who is the biggest manufacturer of display panels in the world? It's not LG Display, it's BOE. Year after year all big names from this field tend to disappear and the only biggest manufacturers are based in China and Turkey. Sony and Samsung have some plants in Poland, the Czech Republic and Slovakia but most of them are in the above two countries.
China doesn't need the USA/North America and Europe anymore, including as a market. They need Asia only and their own one. Neither Trump, nor anyone else can stop this anymore. Yes, China's know-how is still limited in many fields but they have been investing in R&D for years and after the ZTE case, made their way through measures providing much greater self-sufficiency, expanding foundries, developing their own any-device OS (Harmony OS), and reorganising the supply chain to serve them better. They will suffer for a few years but will only increase their self-sufficiency as they go, achieving what they want within a few years (2024-2025).
Last but not least, China in all their history never looked at the Caucasian race/the West as superior to them including at the moment. Also for the past at least 30-40 years they have been acting the very same way as the US and Britain - as an empire - dividing and conquering, exploiting resources (Africa, Latin America) and enslaving poorer/weaker countries. Now they are a real threat to the so called "democracy" or in other words, the corporate globalist cabal seeing a real competitor that doesn't obey their interests and an immediate direct war as in many cases before is not a feasible option. Only time will show where things go but only fools believe in the fairy-tales of Huawei's national security backdoor concerns.