After a particularly traumatic event on TPE, I'm afraid I consider it every person for themself on the trains now, and if this train goes where I want, I'm not getting off it to "help out"
I hate to read this experience and I’ve had similar.
I once stepped off a crush loaded train to allow passengers to get off. The passengers waiting to board elbow me out of the way. So I ended up left on the platform as the train departed!