You know that you don’t have to use AntennaPod, right? 
You did not pay anything for AntennaPod - why do you even complain? Feel free to search for another podcast app that is ad-free, also does not track you and has a similar number of features - good luck.
AntennaPod automatically rewinds a few seconds depending on how long the episode was paused. Have a look at the documentation website for more details.