Cap'n Kobold
Hero
I think the general problem is that the OP did not actually say this; in fact they specifically stated that in a group of other optimisers, the game works fine.I think the general problem some posters have (myself included) is that you're saying that PCs with high differences in overall combat effectiveness is inherently game breaking. I don't think that's the case, and personally I think it isn't even very hard to DM around, especially in a 5e context. Dealing with martial/caster divide in 3.5/PF was much more difficult.
This leads to the situation of people misrepresenting the OP by accusing them of views that they have not stated, in order to defend behaviour that is leading to an active loss of enjoyment to the DM and some of the players of a D&D group.
(Note that your post wasn't the worst of the personal attacks people appear to be making on someone asking for help. It was just the point at which I hit my personal "They can't all be misreading; they're doing it deliberately." point of disbelief. Don't take the face that I replied to you as an indictment that your post was any worse than some of the other ones in this thread.)