Why was Elizabeth angry with Philip II in 1587?

Elizabeth I was angry with Philip II of Spain in 1587 primarily due to his support of the Catholic plots against her and the ongoing tensions surrounding England's involvement in the Dutch Revolt. Philip's backing of Mary, Queen of Scots, who was seen as a legitimate Catholic claimant to the English throne, further strained relations. Additionally, Elizabeth's frustration stemmed from Philip's attempts to assert Spanish dominance over England and her refusal to marry him, which he viewed as a means to strengthen his political influence. This culminated in heightened animosity leading up to the Anglo-Spanish War.