Trip.com complaint: Unreasonable cancellation fee without personal reasons

My flight is a roundtrip: Chicago-Taipei, Taipei-Shanghai; Shanghai-Taipei, Taipei-Chicago. When I booked the ticket, I used a China passport, however, there was no notification or a single word to tell me I should hold an ExitEntry permit for Taiwan when I need to transfer the flight at Taoyuan airport, Taipei. And there was a policy updated on 342023, a few days after I booked the flight, saying even if the passenger has a green card issued by the USA, heshe still cannot get on the flight from Shanghai and transfer the flight in Taipei. I was totally shocked. That means the trip back to USA is ruined. They will not allow me to take the flight because they will check the ExitEntry permit for Taiwan, which has not been issued for anyone for three years!!! I have to cancel the flight, and I felt totally cheated! This is a trap!
However, Trip.com asked for a very high cancellation fee, which is $763. It has already been over 60% of the price of the flights!!! The flight is only $1044 with a tax of $350. I cannot imagine and accept such a one-sided unfair clause because the reason for my cancellation is not my willing or my personal mistakes at all!!! It is totally the responsibility of the airline company as well as Trip.com.
Trip.com and EVA air is cheating many many customers! I don’t want anyone, especially Chinese and Asian people living in USA to be cheated by them!!! I also want to protect my privilege — I don’t think I should pay any cancellation fee but deserve a full refund, since this policy update completely ruined my up-coming vacation back to China and ruined my trip back to USA without letting me know!!! The airline and Trip.com should take the full responsibility instead of letting their customers to pay for the price! To note. This is still 2 months ahead of the departure time, and I even didn’t order the seat for the second flight! Even they fully refunded me, they are able to easily sell that ticket to someone who has a visa for Taiwan! It is truly unfair and unreasonable to ask me to pay for the cancellation fee! I called Trip.com many times, but the agent has the worst attitude I have ever seen. They tried to dig out very tiny details that I even didn’t see when I booked the tickets and used very stupid reasons to refuse my request. I would say if it is any of the airline companies in the USA, like Delta, Southwest, I even don’t need to take so much effort, they will be nice and issue the refund!
I want everyone to know how bad and dishonest Trip.com is!!! Don’t use their website and don’t book tickets on Trip.com!!! I can doubt that Trip.com and Eva Air has some dark business, so they don’t release very critical policy and information intentionally and allure naive customers to buy the tickets by offering a lower price.
Lastly, I would like to say each of my words is honest. I am not a rich man, but I don’t accept this unfair treatment. Both in China and in USA, refunds with a high cancellation fee two months ahead of the trip are absolutely unreasonable! The company just wants to squeeze money from whoever it can. If anyone wants to travel abroad, be careful and don’t choose EVA Air even if their tickets are the cheapest! And I wish this platform can help me to negotiate with Trip.com and get my refund back. Thanks!