Hello aspirant!
Hope you are doing well!

Your question is very general. The difficulty of a question paper is inversely proportional to your practice and smart work.
Though there are variation observed yearly on toughness level but a well prepared student can crack the examination.
There is a detailed article available about it
1) https://engineering.careers360.com/articles/jee-main-analysis#:~:text=The%20difficulty%20level%20of%20the,Mathematics%20sections%20had%20tricky%20questions.
2) https://engineering.careers360.com/articles/jee-main-question-papers
3) https://engineering.careers360.com/articles/jee-advanced-analysis
Hope these links help!

Dear Aspirant,

No exam is hard or tough, its the preparation of the candidate that makes its tough.If you are prepared enough then you won't face any difficulty. The difficulty level of JEE mains is – Easy to Moderate . But the difficulty of JEE Advance is rather more that JEE Mains. But in comparative to JEE Advance , JEE Mains are rather less difficult to answer.

If you want to start fresh for JEE mains then check the link below for some tips and tricks- https://engineering.careers360.com/articles/how-prepare-for-jee-main

Good Luck !!!