Then do the freakin math instead of personal attacks!
A level 11 fighter that doesn't use ASI's for combat will do about 18 damage per turn and have 3 action surges. Over 20 rounds of combat that's 414 damage.
A level 11 Wizard will do about 413.7 damage per 20 rounds using fireball and firebolt - only looking at the single target impact.
Objectively that makes this no combat ASI fighter much worse than the wizard at combat - and that's just in the damage realm.
I did check your math and it looks off to me.
Assume no ASI’s go to Str/Dex/Int or combat feats and standard array so max stat of 16/17.
Wizard: 3x 3rd level + 3x 4th level + 2x 5th level + 1x 6th level slots for fireball = 287 avg damage.
Assume +2 Dex mod and no proficiency on avg for monsters so they will fail 65% of saves and take half on 35% = 236.775 damage from fireball.
Firebolt for the next 11 rounds will yield 117.975 damage
16.5 x .6 hit prob + 16.5 x .05 crit prob x 11 rounds = 117.975
Total for our wizard = 354.75 damage.
Champion fighter... 3 attacks per round but only 1 action surge per short rest. Using a great sword for best basic weapon damage of 7 avg.
(7+3 Str) x 3 = 30 x .6 hit prob + 21 (ability mods don’t multiply) x .1 crit prob = 18+2.1 = 20.1 per attack action. With action surge + 20 rounds you get a total of 422.1 damage
So the fighter over 20 rds will do 67.35 damage more to a single target than the wizard fireballing them 9 times and firebolting them 11.
So the fighter is better at combat and that is very in-tuned or optimized in any way.
Even if you went another fighter and didn’t get the boost to vets from champion you’re still at 400.5, which puts the fighter on average 45.3 damage over the wizard over 20 rounds.
Though I’ve never had a combat go that long which is why it feels like wizard do more damage in a combat even to single targets.