Hey @arekk,
I understand the frustration here and I can sympathise! There isn’t a clean and preferred way of achieving this. Every framework, person, will handle trailing slashes a little differently.
We have an open feature request for exactly this – allowing you to decide whether to opt in or out of trailing slashes – and I’ve added this conversation to the request list. Though, I can’t promise if/when this is delivered.
There are some methods of achieving this though they’re not very intelligent (such as this).