Is my (future?) MIL toxic?

I have been dating my boyfriend for 3 years now and can see things getting serious. However, the one thing that has always bothered me is his mom. His mom is from asia but has been here (in the US) since her college days, yet she only speaks Chinese around me whenever I visit for holidays knowing full well I can’t understand. She also says very misogynistic things (such as my major doesn’t matter because I’m a girl, comments on my tank tops being too revealing even though I live in the south and am a 32A) and I have a hard time respecting her. I bring her gifts every time I visit (has been 10+ times) and she gives my gifts away right in front of me later on. In addition, she will randomly show up to my boyfriend and I’s house and just expect my boyfriend to cancel all plans. She showed up the day before Valentine’s Day and made him cancel all his plans. She also threatens to disown my boyfriend if he dare disobey. And my boyfriend doesn’t stand up for himself or me and doesn’t see a problem? Is this a red flag or am I overthinking it?

Edit: thank you all so much for reaffirming my feelings. I sometimes read the texts my boyfriend’s mom sends him about disowning him if he doesn’t do what she wants, and I stay up late after he falls asleep bawling my eyes out because it makes me so sad that he doesn’t stand up for himself/see a problem. I think I’ll have a conversation with him and try to get on the same page. I also want to do a little test to see whether he chooses me or his mom in a situation before we talk just to see if I truly will always be a second thought for the rest of our relationship. Thank you all💕