I’ve got a fairly new house. There are many things we can’t run simultaneously. microwave and dishwasher. Upstairs mini-fridge and anything in the bathroom across the hall.
It sounds like there may be a curable issue there—maybe some electricians around here could offer some words of wisdom.
When we moved into our current house we hired an electrician to do a full review of everything to see if any upgrades were needed or would be helpful. He was good—suggested a few minor upgrades which we made.