1: You are like 1 search away from seeing the reality of the embargo, Title III which is the mechanism by what you can sue the companies was suspended by every president since Clinton just after the law became effective in 1996, until Trump let the suspension lapse on May 2, 2019. So for all that time the law was effectively useless. [1]

2: In 2000, Congress passed the Trade Sanctions Reform and Export Enhancement Act (TSRA), which authorized sales of food, medicines, and medical equipment to Cuba. So basically how it is a blockade or a siege.

3:Spain trades with Cuba. Canada is one of Cuba's biggest export markets. China is a top partner. The Netherlands, Germany, France, Italy all trade. The EU passed a "Blocking Regulation" making compliance with Helms-Burton a criminal offence in some member states

4: Almost 2 Billion $ of remittances are sent every year from Cubans abroad, and like 1.8 of that comes from the US. If there is an blockade, how can the money go into the island.

All of the issues of Cuba are due to its endemic government, the external conditions are just a reaction to that. Talk with some Cubans about the reality of Cuba and you will get the story.

[1]: https://www.quinnemanuel.com/the-firm/publications/title-iii...