I played 19/15, even if I play tight I lose.
You don't start a session thinking you will play 22/17 today or 12/10. You play the table and player dynamic and use their stats against them.
19/15 gives a VPIP hand range of, 66+,A5s+,K9s+,Q9s+,J9s+,T9s,A9o+,KTo+,QTo+
19/15 gives a PFR hand range of, 77+,A7s+,K9s+,QTs+,JTs,ATo+,KTo+,QJo
Now how do I know you are playing that hand range? Your VPIP could be made up of marginal hands played OOP. You might be raising at the wrong time with the wrong cards against the wrong opponent. Without some detailed information, how do you honestly expect someone/anyone to give you solid advice that will benefit your game. 19/15 tells me very little about your game. Its a stat, thats it. To validate it, whats the rest of your stats. How often do you open raise in EP? How often do you cbet the flop when open raising? Provide a full set of stats, with some hands to support them and explain your thinking as each hand develops, then I believe someone here will be in a position to offer you some very good, valuable advice. Until you do that, you are just pissing in the wind.