Remaining close to any edge is not the best move, players or enemies, you will be shoved at some point, and if you may not know, dash consumes action, shove bonus action, so it's quite normal, and I like that they can think on using it. It's your fault for not being careful.
Can you enlighten us and explain us how you prevent being shove considering that you push / are pushed 5m away, usually a distance that is larger than most "highgrounded" area ?
There's directionality to shoves. The AI will in my experience not usually take long detours to find just the right direction to shove you off a ledge, so just make sure they approach from an angle where a shove is not going to be fatal.
If that's not possible then it helps to make the terrain they navigate hard to move through. The AI really hates moving through surfaces effects, so grease or web or what have you can slow down approaches. Flaming sphere cannot be pushed or manipulated in any way by the AI, so that can also do something. And of course it's reasonably hard to push a character with proficiency in athletics and 20+ strength from a potion. There's also hiding and potion of invisibility. Mage hand is mostly useless, but it's still a "creature", it takes up space, and it costs an action to kill it.
Yes, pushing with a bonus action is powerful, but there's always going to be something or other that is "OP", and frankly I like having options to keep squishy ranged characters apart from mobs of less squishy hostile melee grunts.
Wyll is a warlock and needs room to eldricht blast. Shadowheart deals okay damage with a crossbow but doesn't do a whole lot with dagger and shield, which is pretty much how she has to be kitted to work. Gale is a mage and not that great in melee. And if we can't keep them in the clear for more than one round before grunts have dash, action surge dash right into their face then how are any of them really all that useful? And that's what shove as a bonus action does, IMO.
But yes, it is very strong and what really takes it over the top is just how far people will fly. Reduce it to a default of 2-3 meters horizontal distance regardless of fall distance and suddenly it's a whole different thing.
