garmin fênix 5 update FAILURE

im having a lot of trouble with my garmin fênix 5 for a long time.

Battery drain

sistem mal  function

buttons mal function

light goês on by it self and keeps it on all times

buttons are pressed during an activity.

Many issues for a year an a half of such an expensive smart watch.

I tried to download the 19.1 version and now my watch is completely gone... Stuck in the main page and it doesn t change. The computer dona recognize it anymore.

Please i need assistace.