Awful loading times with Splide sliders

Hi! I made a webshop for a client, which has 3 splide product sliders on the front page. All of them has the js code box, to make custom navigation for them. When the sliders are on the page I get bad loading times (the CLS is handled already), 60 to 80 points in Lighthouse. Without them it is 98… Tried removing the custom navigation part from all of them, but no noticable results, so it’s the sliders fault. Even if I leave one slider there the loading gets noticably longer… Anyone has experience with this? I use WP Rocket with JS delaying, but splide is left out.