I think Ancelotti used the main lineup of Real Madrid. Most of the starting players are substituted players. Real Madrid has won the trophy of La Liga, Ancelotti didn't force his players to play all out. I think the main purpose of Ancelotti is to give more opportunity to play for substituted players and let the main players to take a rest for UCL final match. And Ancelotti tries to remind the players to keep their physical, they must avoid injured because there are still more important match. That's why Real Madrid looks not playing as strong as in the previous matches. If Ancelotti used the main lineup and ordered the players the play all out, Alexander Sørloth won't have a chance to score 3 goals.
Anyway, in most career of Alexander Sørloth, he is often playing as a loan player. He very often loaned by his team to another team to have an opportunity to play. I'm not sure to call Alexander Sørloth as a top striker if he only becomes a top scorer in this season only. He needs to prove it again in the next season.

But it's not a bad result because for the last few games Ancelotti has been experimenting with young players because the final result doesn't matter to them, so it's also a result that I think is quite positive for Madrid in today's match.
Sorloth is really on fire this season although I agree he is not a top striker but his performance this season is the best performance he has managed to create because looking at the comparison of this season at Villarreal with last season at Sociedad his performance this season is much better especially in scoring goals.
But on the other hand we also need to see Madrid's young seeds where today Arda scored a Brace and made his goal acquisition increase so this could be a frightening specter for future opponents if his performance continues like this.
Of course this is not a bad thing for a team that has secured and celebrated the title this season, but in my opinion 4-4 is not a very desirable result when Real Madrid actually led 1-4 in the first half. Real Madrid were very bad in the second half, Alexander Sørloth was the best in that match who then led the top scorer standings with 23 goals.
Securing a win when you are 1-4 ahead of your opponent is the most important thing for any team to do, but today Real Madrid failed to do so regardless of the reasons. Many gamblers are disappointed in the outcome of a match, especially if they have Real Madrid winning instead of a double chance.