Keep your expectations open before you play
You decide to start a session on Gates of Olympus 1000 and hope the bonus round comes soon. Nobody can tell you in advance how often it will arrive. The result of one session is random, whatever the RTP. The RTP is a long-run average, so your own session can end above it or below it.
You want to know which RTP version is running before you place a bet. That information is shown only in the game rules, so open them before your first spin and read the version listed there.
You look at the top prize and picture it landing on your next spin. The maximum win is a ceiling, and players reach it very rarely. Read it as the limit of the game, and set your bets by your budget and your time.