I agree - the post from 5128gap (sorry, can't tag) is excellent.
The issue is that the family dynamic for OP is different to the family dynamic that her DH's family has.
Some people blossom in that kind of close family set-up. Others find it choking and claustrophobic. Neither is wrong, it's a case of personal preferences.
I do think that the OP is wrong in trying to compete with her MIL for her husband's affections. There's absolutely no need and it will just end up with everyone miserable.
Either accept the status quo and understand that you are the wife, and that's something his mother can never take away or compete with. But equally she is his mum, and that's something you can't take away or compete with. Two different relationships that can peacefully co-exist - providing you're not trying to tear each other down.
If you don't think that's possible, you'd be better off splitting, especially as you want children. Bringing children into an unresolved dynamic like this would be a disaster.
You may well find that if you're the bigger person and actively choose to disengage from competition and conflict - (because honestly, who cares if she wants to make him lunch?!) - your MIL will respond in kind, and you'll end up with a much healthier dynamic, and possibly even a warm, loving relationship with her.