The only type of marriage that does not require constant effort is a failed marriage.

It requires effort, but it's not always a chore. It should make your life easier by sharing the load of everyday burdens. I'm thankful to be sharing my life with my wife.

I wrote "effort", not "chore", and yet I got downvoted...

I think because it came off as gloomy. I tried to differentiate effort from being and solely negative and emphasize how marriage is a combination of the good and the bad.

Life in general requires constant energy. Unless you’re freeloader. Be it relationship, participating in a society or anything else.

Are you implying that marriage is, somehow, the end state of relationship building? I can assure you it does not end at marriage.