What's wrong with Joselu? He got Real Madrid almost for free and was able to score 10 goals, including 2 very important goals in the Champions League against Bayern and in fact his goals took Real to the final. I think it is very useful to have such a player in the reserves, because he costs a few million and brings very important victories.
Guardiola apparently doesn't get along well with Haaland judging by the way his season went, but still while Haaland is under contract Guardiola will be forced to use Haaland, if only to keep his transfer value up.
I thought that after he scored a double in the semi-final, Ancelotti would think about giving him a place in the starting line-up in the final, but instead he came on only in the 85th minute, apparently his role at Real Madrid is to be a substitute player.
Why did you decide that Guardeola does not have a very good relationship with Haaland? It seems to me that everything is fine, he plays and scores, maybe he doesn’t show the best game in some matches, but scoring in every match is not easy. But with whom Guardiola’s relationship deteriorated, it is possible with De Bruyne, he often changed him and De Bruyne often expressed his dissatisfaction because of this.