I just started BDM. Its an ok hack and slash mobile game, but i wonder if it has endgame content - like poe, maps - or is only the quests and then its over?

Endgame of BDM is PVP - the Main Quest won't be that difficult nowadays. Events are meh, sidequests are also meh. So, Endgame is actually PVP.

If you are a pure non-spender, pray a lot to the RNG gods or else you'd be following the quitting bandwagon.

So what stuff can i do in end game, even with pvp?

https://www.youtube.com/watch?v=uyKx2g_zKMI

Check out this video, and dont listen to toxic people :)