Samsung being unfair with its Customers?

According to a report by a reputed website, Samsung USA has confirmed that the International Version of the Samsung Galaxy S3 (i9300) will not be given an update of the latest Android Version, i.e., Kitkat 4.4.2.

The reason stated behind not providing the update is that the phone is not capable of downloading/handling the update as it has 1 GB of RAM.
     The contradiction is that Google has made Kitkat to run smoothly on phones with as low as only 512 MB RAM!!

The Phone performed well with Jelly Bean 4.2, but after the Jelly Bean 4.3 update, given by Samsung, the phone has become a piece of irritation & trouble; as all users of the phone have experienced. 

There is an never-ending list of problems that have come with the last update (Google it).
The battery lasts half the time now, phone gets heated up, lots of lag, slow browsing, and errors to name a few.

Now, Is it fair that Samsung provides the users a buggy update which ruins the phone and then makes the consumer suffer with it?

Samsung's Galaxy S3 had been the "Highest-selling phone of the year" & is still in the hands of a huge number of people.
People had spent more than INR 40,000 ($700 approx.) for a phone which didn't had so many bug in it.

Believing in the company, people upgraded their phones to official JB 4.3 and found themselves trapped with the bad update as it was said by SAMSUNG THAT ONCE UPGRADED, PEOPLE CANNOT DOWNGRADE TO JB 4.2

Shouldn't Samsung provide the JB 4.4 update or a proper update of JB 4.3 to resolve the issues? Isn't this cheating to sell a bug free phone at first, make it buggy with an update & then don't care about fixing it?

Many people have taken a resolute not to buy a Samsung again.
Does Samsung Care about its customers? The attitude says negative.

What are your views..? Let us know in the comments.