Last I checked this was a land war, so kind of weird to talk about great successes in Black Sea which are also rather questionable given that Russian navy still has dominance there. Meanwhile, the amount of military infrastructure Ukraine manages to blow up is minuscule, especially compared to the amount of infrastructure Russia blows up in Ukraine on regular basis.

The war on the actual frontline is still primarily conducted by artillery which accounts for 80% of casualties. However, even in drone production, Ukraine is far outmatched by Russia which does it on industrial scale.

The idea that Ukraine has been building up military production is frankly nonsensical because Russia is able to strike anywhere in Ukraine with impunity. This precludes Ukraine from having large military factories, and at this point Ukraine even lacks the energy infrastructure to run them because Russia has systematically dismantled it over the past three years.

Finally, aside from having shortages of literally everything, Ukraine is running out of manpower as its army is being attrited by Russia. Even if Ukraine was able to produce weapons domestically at scale, which it cannot, there aren't people left alive to use them.