Interesting question. Speaking in terms of the makeup of the language, the subjunctive tense is completely alien to native English speakers. And the same as other Indo-European languages verb conjugation is more complex in Spanish than English. In English the verb in a particular tense is generally the same for I/you/he/she/we/they, except you add an s to the conjugation for he/she/it. But then English verb conjugation is highly irregular and often doesn't follow rules so this is a drawback compared to Spanish. Native speakers naturally know the right conjugation to use, but for learners I guess sometimes there is no way to know other than simply memorising, whereas with Spanish you can often work out the conjugation from general rules. But these are just parts of the language that you have to accept. Personally I find listening the most difficult part of learning Spanish, rather than any particular grammatical rules. The rhythm of the language is very different to English which makes it hard to understand when spoken quickly.

I agree with your idea that we can use the same word to express a lot of things in English.