I'm sorry, but revenge for what? Clearly there's only one person being an asshole here, and it's you. Unless, of course, we're missing key context.
Viewers simplify this whole sequence to "He hates working in an office job that robs him of his masculinity," but that just makes our hero look like a psychopath. Why not look for a different job? Preferably one that requires less travel? But this character has this particular job for a reason. The movie doesn't make him, say, a traveling salesman or copier repair tech.
It turns out that company and that boss knowingly sends out cars with, quote, "front seat mountings that failed collision tests," "brake linings that stop working after a 1,000 miles," and "fuel injectors that explode and burn people alive."
That, then, brings us to Tyler Durden. If this was just a story about a guy who hates being an office drone, then it would make sense that his imaginary friend / alter ego would be the manliest man's man his imagination could come up with. But that's not what this story about -- it's about coming to terms with a system that trades lives for a few dollars off the bottom line.
It makes much more sense if the "Tyler" the Narrator conjures into existence is the embodiment of this, a real person who died in one of those defective cars months or years before the movie starts. A case that the Narrator worked on. A case that broke him.