[2021] When will the game be fixed?

To answer your question, bugs and issues within the game (including those from the bug report system) are fixed on a weekly basis and always have been.

We have recently even started a whole weekly series dedicated to showing some of the major fixes of that week. The most recent of which can be found here: https://warthunder.com/en/news/7223-it-s-fixed-10-en

You can find a list of all the changelogs which are published almost every day here: https://warthunder.com/en/game/changelog/