Dear Samsung Member,
Greetings from Samsung Customer Support!
We at Samsung understand your concern. We apologies for the inconvenience caused. Kindly follow the below mentioned steps to improve the performance of the device:
We would request you to please click on the mentioned link to resolve the issue related to device heating:https://www.samsung.com/in/support/mobile-devices/why-the-heating-issue-occurs-in-mobile-device/
Slow Charging issue:
1. Perform Battery Optimization: Settings>> Select Device Maintenance/Device Care>> Optimize>> Optimize all options like Battery, Storage and Memory
Battery Drainage related Concern: For more information, you can also follow mentioned link:
If the issue still persist, we would request you to register your concern in Samsung Members Application in order to assist you better. (Samsung Members App > Get help> Feedback >Error report > Attach log file for any issue)
Thank you for writing to Samsung.
Samsung Customer Support