They did, and it was dissmissed: https://www.xataka.com/empresas-y-economia/duro-reves-para-cloudflare-justicia-rechaza-su-demanda-laliga-bloqueo-masivo-webs

The summary is that according to LaLiga, Cloudflare is helping the distribution of football through unofficial sites by hiding them behind their IPs: https://www.laliga.com/noticias/nota-informativa-en-relacion-con-el-bloqueo-de-ips-durante-las-ultimas-jornadas-de-laliga-ea-sports-vinculadas-a-las-practicas-ilegales-de-cloudflare