If you want to get your confidence back I recommend sticking to casino $1/3 Hold’em. As long as you stay disciplined it’s almost like stealing money.
In my last 8 sessions at Borgata since I’ve been tracking I average $62 and hour with an 88% win rate. At Encore Boston…even with double the rake of Borgata, I’m $88.15 an hour and a 60% win rate over the last 6 sessions.
I think it depends a great deal on the size and location of the casino. Borgata and Encore Boston are in highly-populated areas. Their poker rooms attract a lot more casual players, tourists, curiosity-seekers, and whales.
The casinos nearest to my rural area (all 1-2 hours away) are not like that. The 1/3 tables are full of old regs who sit nursing their one buy-n all day—rocks. If there is any action, it is typically from gamble-y short-stackers, who buy-in for the minimum, and wait to shove preflop with any pair or AK. But because they are short (~33BB or even less), these pots don't get very big.
There are no whales, no tourists, and few casuals playing 1/3 at a place like Rivers Schenectady, an hour from me... The total amount of money sitting on your typical 1/3 table is very small, comparatively speaking; just not worth my driving an hour each way for. There are home games closer by, where the action is much livelier and players are regularly rebuying for the max; so I don't bother much with small casino 1/3 games, which are raked beyond belief, except (say) if I’m killing time waiting for a big tournament to start.
I’m also not sure whether it is correct to assume that at places like Borgata and Encore that 2/5 is significantly harder than 1/3. You may get a few better players, but there also is a lot more money to be made. If one is at $90/hour at 1/3 one ought to be able to do $150/hour at 2/5.