I think it's different, Madrid looks to be playing safe and not as aggressive as usual. I don't think it's pressure from Betis. Madrid tried to maintain performance and play calm so as not to experience defeat ahead of the UCL final.
Regarding the mentality of the Madrid players, I believe there is no need to doubt it. they have it all, and will continue to play their best.
ended the season with a draw, I don't think it's bad. they are still champions.
Naturally, it's the right of all clubs to want how they perform. All clubs want to win but sometimes there is one factor that matters. This is the reason Madrid only draw.
I think Anceloti has got the league title, he doesn't want to risk his best players. It's different if the league still hasn't found a title like the EPL this season. This I've guessed from the beginning Real Madrid have ensured the La Liga champions the rest of the game they will only go through without forcing the best players to perform.