Stuck in BL2 and don’t know what to do [duplicate]

Solution 1:

The biggest thing is to check that your weapons are a reasonable level compared to enemies. Lower level weapons might have been fine in normal, but as you said TVHM is more challenging.

Make sure you are using the different elemental weapons properly. In normal mode for example fire deals 150% damage to flesh (red health) but only 75% damage to shields (blue) or armor (yellow). In TVHM these are increased further to 175% for flesh and 40% for shields and armor. As for other damage types, shock weapons deal bonus damage to shield, and corrosive will deal bonus damage to armor. On top of that, using slag on a target makes them take double damage from all non-slag damage types.

An easy way to farm some weapons and EXP would be to repeat the Warrior fight on normal mode. Since you've completed the DLC's you can also do tier 3 fights at the campaign of carnage.