I think everyone will have a different opinion :)  

When talking about learning a language, Chinese people often think of reading and writing, but native English speakers often think of speaking and listening.

Opinions will also differ based on how long someone has been learning a language.

People will also have a different opinion, based on their native language.  A person from France will think English is easier, but a person from Japan might think Chinese is easier.

In my personal opinion, learning to speak Chinese is very difficult for the first few months, due to having to learn tones, and new ways of pronouncing words.  After a few months, spoken Chinese is not too difficult, just a slow learning process.  However I have heard that spoken English is usually very easy to learn  (at the beginning anyway!). 

Even though English is easy to pick up at first, excelling in English requires mastering English grammar, which many people struggle with - a lot of people have been learning English for more than 10 years and still struggle with grammar.  If someone makes a grammatical mistake while speaking, sometimes it's not noticeable, but if someone makes a grammatical mistake while writing, it's much more obvious.

People learning Chinese often struggle with Chinese characters and 成语

Both languages have many complexities and a lot of vocabulary.  I feel that Chinese is difficult at first, then becomes easy, but to reach a high level requires a huge amount of effort, so it becomes difficult again.  I feel that English is easy at the start, but to become good at it is a bit difficult and takes a long time.

Have you found any partner to exchange their thoughts?

the reason the stars are not visible in the pictures on the moon is because the surface of moon is reflective and so the light from the sun reflecting off the surface drowns out the light from the stars.

why googleing pictures of astronauts on the moon from nasa. the pictures seem counterfeit any star.

any language would be difficult for you if you can't understand what it says above.