What are Malaysian's Opinions About Not Going Back to In Laws for CNY?

I've been married to my husband for 10 years now. We have a 9 year old kid. All these years for CNY I have gone back to my in law's for CNY, spending the Eve, 1st, 2nd and sometimes 3rd day of the CNY with them.

Before I go on, here are some context. My relationship with my in laws are not the warmest due to some events and misunderstandings earlier on in my marriage. If you all want to know the details, I have them written in another post under my profile. One point I want to highlight from that post, is that my in laws are VERY against the idea of us spending CNY eve with my side of the family, even if we planned to go back to them on CNY Day 1. My husband suggested that in one of the years earlier and we got hell for that (details in my other post).

So basically, I really dislike my in laws (not just because of the above incident but also we're just very different in opinions and values) and dread CNY every year. Also I tend to be rebelous of any old traditions that suggests women must obey and follow their husbands once married.

Now if the in laws are people whose company I actually enjoy, I have no problem following traditions spending a few days a year, even sacrificing a couple of leave days from work, to travel to the in laws (different state). Also I want my kid to have normal CNY memories where both his mom and dad were present during CNY celebrations (also during his younger days, I needed to go with him to take care of him). And truthfully, I like the CNY mood if not for the fact that I have to leave my own family and spend it with people I don't like.

This CNY, I am contemplating not joining my husband and my son to going back to my in laws. I don't care about what they'd think but I am a little sad for my son. Am I over concerned? Will this actually have a big impact on my son? Right now when I ask my son whether he would like me there with him for CNY, he is indifferent because he had been going back without me on other days throughout the year, and CNY is just another holiday to him so he does not feel anything odd about me not joining them.

The thing is, going back to my in laws is a psychological torture to me because I have to pretend like I like them. Pretend that everything is fine. Pretend like I don't see how my MIL treats my husband and my son like kings (serving them food and water, showering them with praises for the smallest things, practically worshipping and spoiling them in such unnatural ways). Again, more context on this is in my other post.

So what's everyone's opinion on this? Anyone in similar situations?

Happy Chinese New Year in advance to all who celebrate!

Edit to add more info: I was prepared to do it all again this year, expecting to return home on CNY Day 3. But then my husband suggested that we stay until Day 4. I know it's only one day more, but staying there for 4 days in the previous years was already stretching my limits and I am really disappointed that my husband failed to see this. When I protested, he refused to budge and when I blurted out that I am now thinking of not joining them, he even agreed to it. He is not doing this out of spite. My husband is really that clueless. He does not know the kind of long term implication this might have over my already murky relationship with his family, or the potential implication to our son.

Updates: First off, thank you to all who took the time to comment. I did follow them back to my in laws on Eve and stayed until Day 3 like all previous years. Husband agreed to this, at first begrudgingly but later became more understanding. He always takes some time to process things sensibly so this is not unusual. The 4 days at my in laws were uneventful but psychologically draining nonetheless.