Worst thing about AE is trying to bulk buy/lease used aircraft, takes forever to load, more than any other action. Not to mention the billion browser tabs
Same reasons as why spamliners & other very shady tactics aren't banned: They are simply allowed by the rules.
Would be a pleasure banning them all but it's probably a better idea to have a "realistic airline" world and a "shady tactics" world. No clue how that would happen but sure is a fun concept.
Undercut the undercutting spamliner, works even better if your reputation is higher. Try not to go to far before your profit becomes literally nothing.
It's a very simple but strong strat, gets me in the top 10 every time I'm a bit early in a world.
Also, try not to have any competition unless you have no other option. I try staying away from most competitive airports like JFK, Dubai, LAX, etc. Earns you a lot more in the end & you don't have to check every hour if someone undercut your routes. Also short but heavily demanded routes with little to no competition are ideal, spamliners sure love using them in the US or China