Resignation made me hate my job even more

\​

I have resigned from this job due to its work pressure and I'm not at good terms with my manger I haven't discuss with her that Im going to resign and she is kind of mad because of that she also hired new team members

When I had the Hr discussion, she said that you are not supposed to take any leaves or else your notice period might get extended

Two members of the team has also put down their resignation and I feel I'm the only one who is been targeted by her, the team members who have resigned along with me were given leaves and when I have asked leave for my sister wedding she refused saying u can't have leave in notice period and was pretty rude saying taking any unapproved leaves may cause behavioral issues I just feel I'm the only one who is been targeted because I'm in resignation now and I have more 1 month left to leave this shit hole and my sister wedding is in last 10 days of my notice period

I don't know what to do now