If I'm understanding correctly, you've filtered for all hands in which you called river?

In that case, you're definitely supposed to be losing. You're getting pot odds on the river, so you're looking to call when you win more often than the price you're being laid, but you should still be losing more of these hands than not.

Keep in mind, this also removes any hands where you faced a bet and decided to raise the river.

ye you understand what I was saying

thx for your answer. It's logical and explained this well.
even if this doesn't fix my problem of making monkey calls river ^^

thanks

Seems to me you should check what your winrate is when you fold river and compare that to your winrate when you call river. It's apples to oranges if you compare your overall winrate to your winrate on river calls (as Phil points out it's generally not a very good situation to face a river bet and not be at the top of your range)

Also if you compare you should exclude the moments where you are slowplaying.

You might find looking at your river call efficiency stat is useful too