Why is it strange for Spaniards to speak English?

It is normal for Spaniards to speak English with an accent, and most English is not good. By the way, although the letters in Spanish are roughly the same as the 26 letters in English, they have different pronunciations, and English pronunciations are also different from Spanish pronunciations. Although some words in Spanish are similar to English, their pronunciations are different. For example, "hospital" in English is [? h？ sp？ Tl], Spanish [os? Relatively speaking, Spanish spelling is much simpler than English.