I feel most people expected a win from Chelsea in their last match. It’s a disappointment, because how will they even allow Sunderland get a win in the match, Chelsea were able to win against Tottenham, so I expected them to win against Sunderland, but they failed. Next season is really going to be a difficult one for Xabi Alonso, because he will have to rebuild Chelsea, he needs to flush out some players in the team, some players are not suppose to be playing for a team like Chelsea, and he will have to sign some players to improve the teams performance. It’s even better that Chelsea didn’t qualify for the Europa League, they should focus only on the premier league.
It was their last game of the season, and also their last chance to make it to the Europa League. Despite the fact that the odds for both clubs were very high, I expected them to beat Sunderland in that match since their performance was not as good as they were from the beginning of the season, but Chelsea remained the most worst team in the Premier League, losing their last hope to qualify for the Europa League. Next season they will compete in the league.
Maybe you've not been following up with Chelsea and that was why you expected them to win Sunderland. Sunderland is not on the same level with Chelsea this season and it would be surprising to Chelsea winning over them especially in a crucial game as that last match of the season. If you watched Chelsea and Tottenham match, you could noticed that it was a battle between two poor teams but Tottenham was the worst side. I feel sorry for Xabi Alonso for accepting Chelsea job at their worst period and the scary part is that English teams don't usually have patience with their coach. I hope he doesn't get sacked mid season.
The English clubs do not have patience with their manager, but unlike Manchester United. Chelsea has sacked like 4 to 5 managers behind Ten Hag. You should say that Cheslea football team do not have patience with their managers.

Xabi Alonso is one of the experienced managers, but Cheslea need to stop signing young players right now, most of the players they have signed have lose form after playing 5 to 6 matches.