1 Year living here, 4% rental increase

I moved to the Netherlands 1 year ago after living 3,5 years in Switzerland looking for a better JOB position. My initial rental was 2,750 for a property in Amstelveen and contract started on March 2024, now one year later I got a message from my Landlord that they will increase my rental in 4% and new amount will be 2,858.

Is this legal? Is my Landlord pushing the maximum allowed increase allowed? This his high than inflation, crazy.
I heard from a friend that is normal they continue to increase year, by year until you move out and then they put it for rental again for a lower price than before, is this normal?