Yes you are TA. I say this as a socially awkward introvert who also does not come from a culture where baby showers are really a thing (my mom didn’t come to mine, she lives far away, and this totally makes sense to us and is totally fine and normal).
You are pushing away joy and well wishes.
They want to give you presents to try to make the really hard early months a little easier, prettier, happier. Be grateful!
If they’re using you as an excuse to party, great! Less focus on you, let them hang out but also make it a pretty afternoon w some presents for your family.
Your husband has to work w these people. What a bummer to know his wife was such a downer right off the bat. Maybe he won’t fit in w our company culture as well as we thought. Let’s maybe rethinking including him on that group text.
You also have the best ever get out of jail free card for leaving things early—-you’ll be pregnant! So if you are starting to feel tired and need to rest, everyone will understand, and they can continue the party without you guys. All great.