I have been fortunate to have serviced every brand mentioned in this rant.
I have seen problems with every brand of furnace. I also believe 80% of these problems was due to a poor installation. When i give a customer a free estimate to replace their aging furnace or a/c, i let them decide between a Trane or a Goodman. Goodman wins 90% of the time. Why should narrow minded ranting asswipes chose what system a customer buys?