KJo early position, early stages, you are going to lose a big pot and always win a small pot
100% agree. If someone 3bets you, a LOT of times their hand is going to dominate yours, like AK for example. Then, if the flop comes K84 for example, you've flopped top pair but now what? You're playing a pot out of position and have to effective guess and hope you have the best hand.
Also, you have too many hands to get through to see a flop, especially if it's 8-9 handed. A 6-handed table, it can still get you into trouble.
Low pairs, except when necessary due to low stack.
I almost take the opposite approach here, though it's situational. Low pairs are REALLY good to play when you are deep stacked because of the potential to flop a set and then getting paid off by somebody who overplays top pair on board. So let's say you have pocket 5's, and raise pre-flop and get one caller, and the flop comes 59Q, there's going to be a LOT of times where someone has AQ and will bet for value. Most of the time that will work as they will have the best hand there, but some players get married to these hands and lose a LOT of chips to a set.
Then, let's say you're in a tournament situation, where you are getting short in chips at an aggressive table. Let's say you have 15-20 big blinds and you get dealt 33 in early position. Because you are so shallow here, someone is likely to 3bet (not-all in) or even shove pre-flop, what do you do then? If you raised first, you'll have to determine if you want to play for the rest of your chips against someone whose range doesn't have you in terrific shape. At BEST, you're flipping against two overcards (likely 2 broadway cards) but more likely against an overpair.
Here, if in early position, I'm likely to fold and save those two big blinds for a better spot in a better position. I've seen MTT streamers do this quite a bit and most of the time, they are right for this exact reason. If you want to play for all your chips, be the one applying pressure, not the one reacting to it. Even if you're short stacked, your chips are STILL a weapon if applied in the correct spots.
(My own separate comments) - Hands I avoid are dependent on the situation and the players you're facing. Take AQ, if I'm raising and then someone who plays tight 3bets me, I may fold. Conversely, I may 3bet AQ against an aggressive player who may likely fold to pressure from me. That's an oversimplified example, but shows how a single hand can both be a hand to avoid and a hand to play.