People are urging boycotts and criticizing Amazon's treatment of workers on its biggest day of sales

Getty/Chip Somodevilla

Many are speaking out against Amazon during its biggest sales event of the year.

• Amazon's critics came out in full force on social media in the run-up to Amazon Prime Day, attacking the company and its CEO, Jeff Bezos.
• These consumers urged people not to shop the Prime Day sales and to boycott the retailer for its working environment and tax policies. 
• The company has come under increased scrutiny as it has grown at a rapid rate over the past few years. 

Many of Amazon's harshest critics are taking Prime Day as an opportunity to voice their concerns about the e-commerce giant. 

Before Amazon's technical glitches plagued the beginning of its Prime Day sales, hundreds of consumers took to social media to show their disdain for the retailer, urging customers not to shop there.

For some consumers, Amazon has increasingly become a symbol of everything that is wrong with big corporations in the US - an image that has historically been associated with Walmart. This has intensified in recent years as Amazon has grown and spread its tentacles into new areas of business.

Today, the backlash is mainly centered around the issues of taxes and workers' rights.

President Donald Trump has repeatedly lashed out against the company and its CEO, Jeff Bezos, on Twitter, accusing the company of not paying taxes.

This is true - Amazon pays almost no federal taxes. As Business Insider reported earlier this year, the company uses a variety of tax credits and tax exemptions, which are legal and built into the US tax code, to avoid paying these taxes. 

But perhaps the biggest reason for the anti-Amazon campaign stems from recent reporting about working conditions in the company's warehouses. 

In 2016, a journalist went undercover as a worker in an Amazon warehouse in the UK and described how workers were peeing into bottles because they feared that bathroom breaks would take too long and cause them to miss their strict targets.

Several warehouse employees subsequently confirmed this crippling working environment to Business Insider, adding that the constant surveillance and security cameras dotted around the warehouses made employees feel like "robots."

Amazon workers in Spain and Poland went on strike on Monday to protest against the conditions at its warehouses. Thousands more are expected to do the same in Germany on Tuesday.