Definitely second ProfXs questions/suggestion.
You do not have huge numbers, granted. So maybe your body isn’t ‘disproportional’ though I know what you mean (everybody wants huge arms, many don’t give a shit about the rest - apologies if that’s not exactly you).
What is strange is you did not mention your training weights for any bicep or tricep exercise. These will be important, of course.
Have a read of these two threads on biceps and triceps. Get tips, improve your performance, control the negative, increase the poundages over time. Size will come.
In essence:
(Suggestions in brackets are only suggestions. If you find a better alternative for you, no worries.)
Incorporate a few curl movements (maybe standing EZ bar curl, seated db curls on incline bench with a stretch, hammer curls) a heavy press (close grip bench press) an extension-type movement (tricep pressdown/kickbacks/PJR skullcrushers) and a long-head-dominant overhead extension (seated french press).
Then get better at these.