I think most players would have a problem with inefficient characters at some point.
For you (general you), where is that point?
I will give you a few example from game play experiences I have had, where my line in the sand is.
The little halfling rogue in a Pathfinder game who wanted to spend most combat hiding, not because he wanted to gain a tactical advantage but because his character was a scaredy cat. He only used a dagger, because he used to peel apples and didn't ever go for a flank.
Another rogue in a 4e game who only ever wanted to use basic attacks, the player thought encounter and daily powers were silly.
A dwarf who only ever used his grandfather's axe even when we started to run into monsters that needed magic weapons, he insisted that if it mattered the spellcasters should cast magic weapon on him during combat wasting a spell when we had plenty of magical weapons he could have used instead, this was 3e.
I went off on someone in a 5e game shortly after the PHB came out for not wearing studded leather instead of leather armor, because he didn't like the way studded leather looked.
We had a cleric who refused to heal anyone during combat or after unless they first prayed to his deity. The DM ruled doing so meant you didn't do anything on your turn besides pray, because the cleric wanted more than just lip service. So essentially no in combat heals at all, because giving up your action to pray was just dumb.
Been a long time now but I remember someone in a 1e game who rolled up great stats for a wizard, piss poor strength, solid dexterity, good constitution, and an 18 intelligence. He wanted to play a fighter, so he played a fighter. Deities help me, that was an argument with a good friend over why on earth he would do that.
Most of the time it is some minor quirk or thing that not only limits the character in question but they expect the other party members to take up the slack or help them out, or the DM to give them a break. I have even seen posts where DM's talk about rewarding "roleplayers" over "rollplayers" and it turns my stomach. Don't encourage the people bringing the party down, teach them that if they want to play inept characters than they get to play inept characters. The DM in that 1e game eventually gave the fighter a belt of giant strength for example, pissed me off.
So yeah, I dislike people who choose to be weak in a team activity, because they don't just make themselves weak they make the whole team weak.