Why do people feel their time was wasted? They have had their wins and weapons and armors for ages already and will continue to next content ASAP and yet again be ahead of the people who are still tackling older content.

It's like... imagine if someone gave you a really spiffy bike while your buddy has no bike. For 4 months you will ride the bike every day while your buddy has to walk. One day, someone gives your buddy a bike too. But on the same day, he would also give you an awesome car. Would you now be mad your buddy has a bike and feel like the 4 months you didn't have to walk was useless?