Question

As is well known, the holiday of Simchat Torah is a holiday on which people are supposed to be very joyful (literally, the word “joy” is in the name of the holiday).
In addition, it is one of the festivals on which we say, “the season of our rejoicing.”
 
The question is: how much and in what way can one rejoice, and is one even supposed to rejoice at all, when at this very time last year what happened, happened?
And more generally, how can one rejoice on Sukkot, etc., with full joy when we are still in the midst of all this?
Is the Torah’s expectation that we live with dissonance? Maybe a relative kind of joy? How are we supposed to conduct ourselves in general in this situation?
 
Thank you very much!