Finally upgraded my home sound system but can’t get dialogue clear in action movies—any tweaks I’m missing?

I recently replaced my old 2.1 soundbar setup with a 5.1 surround system (Yamaha RX-V6A + Polk Audio speakers) to boost my movie nights. The room is about 15x20 feet, and I’ve positioned the speakers according to the manual. The problem is, during fast-paced action flicks like "John Wick" or "Mad Max: Fury Road," the dialogue gets buried under explosions and music. I’ve tried adjusting the center channel volume and switching between sound modes (Cinema, Standard, Music) but no luck. I mainly watch in the evenings when it’s quiet, so background noise isn’t the issue. I want to keep the immersive feel but not miss what characters are saying. Has anyone faced this with similar gear? Any specific equalizer settings or sound modes that help bring dialogue forward without losing the surround experience? Also, is it worth investing in a sound processor or should I just tweak what I have?