If I were to hazard a guess based on your short description, you are probably playing overly loose and aggressive in the beginning of your session and then your opponents may be using your aggression against you leading to you losing your stack. If this is the case, I think you’d need to learn how to balance your attack.
This is definitely possible. People with a maniac style are often able to win many pots without showdown in the beginning of a session. But when the other players have picked up on the fact, that the maniac is out of line, they will obviously come after him, when they have a hand, that is strong enough, and then he often end up getting stacked.
So if you really want to use this style, you should either make it in a "hit and run" way, where you only stay for a few orbits. Or learn to change gear, so that you have gone back to completely normal play, when the other players have gone into combat mode. Personally I prefer to just stick to a more boring TAG-style, that allow me to stay at good tables, as long as they last