The energy we're seeing build up in the oceans is a massive red flag, for one. I can't say for sure off the top of my head but it might be the most intense concentration of energy in the oceans that has ever existed in all of recorded human history.

Trying to blame this exclusively on the typical El Nino / La Nina and their presumed relation to solar cycles is wild, but you can see how it would be easy to dismiss it when the cycle is ~11 years and that limits the number of events we can record and analyze with modern technology as well as how many times a single human can witness them in their lifetime so it's hard for someone to say what is "normal" or not