Either he decided he didn’t want to t-bone Piastri who had just crashed and parked his car in the proverbial wall or he had a similar slip as Piastri and crashed. Having seen how much he breaked, I think it’s the first.
Hope all your family and friends are okay and not hit by the tornado btw
He avoided hitting Piastri, who had already crashed, the only way he could, by hitting the wall. It was hard to watch, you knew it was coming watching on tv, but Ricciardo couldn't see until it was too late.