deadpotential
When I started writing my own stories, I always wanted to introduce the background story and quickly get to the main point, which is why I understand the reason for this novel's quick pace. However, it took me a while to fully understand the benefits of really nailing down a backstory. It's too late to change it now, but maybe in the future if you want to do something similar, I suggest to take your time writing the backstory. Go through the emotions, changes, growth and setbacks so that it can be appreciate a lot more when the MC finally starts getting his revenge, payback, etc.