Yes, this is how interest works and how lenders make money. It's a lot.

The lessons are:

Pay a little bit more every month (applied to principal) to the effect of 1 additional monthly payment a year or more. It will dramatically reduce your overall interest and length of loan.

You're talking about a long loan, during that time rates will rise and fall. When they fall, you refinance at a lower rate. Don't extend your loan longer (don't take another 30 year loan after you've lived there 5 years, take a 25 year loan). That will give you the best market results for something you can't control.