If you buy a horse, obviously it's upkeep will cost you more than if you bought a donkey. You can't use that to justify a donkey being better than a horse.
On a serious note your argument is absolutely useless, W211 E classes are considered to be the most reliable mercs ever made and they came with a multilink rear suspension. There are plenty more examples of cars using multi link suspensions that are quite reliable. Evos, Stis, Audis, all have extensive offroad capabilities and they have multilink or double wishbone suspension setups. And there are plenty of these cars that are still on road from the early 90s even.
Please stop being a fanboy for corolla, and start to accept the fact that the torsion beam is not as good of a suspension even when it comes to offroading. You cannot possibly believe that you know more than the people who actually make these cars and spend thousands of dollars in R&D to find the best suspension geometries and setups. If rally cars have been using multilink setups since the 80s then yeah its a much better and more refined suspension than corolla.