Borderlands 2 can be if you only chase the objectives and in a group.
Playing solo the game ramps up the difficulty pretty regularly and steeply. Where I am at the moment there's a 3 level jump between me and the recomended level of the next story mission. It's like the game wants to force you to either co-op it or go and down a bunch of side quests first for the XP.
I don't know if there's anything inherently wrong with wanting you to do either of those things but it's not exactly all that condusive to me finishing the game.
ive been playing Maya with the middle tree (health based one) and im almost at the end and I have to make an effort in order to die. I get health from basically everything I do, constantly
but I do get what you mean