Hi
drishtantmahajan4059,
For Black crush - Yes there are updates push which helps and optimizes the display, Will it be 100% solved the updates makes it better with each push. The solution I have been giving to all IN customers:
If there is Black crush issue and even after software update and factory reset if doesn't satisfy the performance, Please visit the nearest service center. If any issues do let me know.
For Android 11 it is already under BETA and the stable release is expected soon.