Found the solution adding this to the functions.php:
function disable_wp_blocks() {
$wstyles = array("wc-blocks-style","wc-blocks-style-active-filters","wc-blocks-style-add-to-cart-form","wc-blocks-packages-style","wc-blocks-style-all-products","wc-blocks-style-all-reviews","wc-blocks-style-attribute-filter","wc-blocks-style-breadcrumbs","wc-blocks-style-catalog-sorting","wc-blocks-style-customer-account","wc-blocks-style-featured-category","wc-blocks-style-featured-product","wc-blocks-style-mini-cart","wc-blocks-style-price-filter","wc-blocks-style-product-add-to-cart","wc-blocks-style-product-button","wc-blocks-style-product-categories","wc-blocks-style-product-image","wc-blocks-style-product-image-gallery","wc-blocks-style-product-query","wc-blocks-style-product-results-count","wc-blocks-style-product-reviews","wc-blocks-style-product-sale-badge","wc-blocks-style-product-search","wc-blocks-style-product-sku","wc-blocks-style-product-stock-indicator","wc-blocks-style-product-summary","wc-blocks-style-product-title","wc-blocks-style-rating-filter","wc-blocks-style-reviews-by-category","wc-blocks-style-reviews-by-product","wc-blocks-style-product-details","wc-blocks-style-single-product","wc-blocks-style-stock-filter","wc-blocks-style-cart","wc-blocks-style-checkout","wc-blocks-style-mini-cart-contents","classic-theme-styles-inline");
foreach ($wstyles as $wstyle){
wp_deregister_style($wstyle);
}
$wscripts = array("wc-blocks-middleware","wc-blocks-data-store");
foreach ($wscripts as $wscript){
wp_deregister_script($wscript);
}
}
add_action( "init", "disable_wp_blocks",100 );