Yes but Germany did also apply countermeasures.
German countermeasures, like their radars and other electronic components, were behind the Allies. What little they managed to do often ended up with mixed results.
For instance, the US/Britain used at least two different jamming methods: Electronic Jammers (Carpet) and aluminum foil dropping (Chaff, or known by the British as Window). The germans developed circuits that could distinguish moving from stationary targets could get through chaff, but this circuit was vulnerable to electronic jamming from Carpet. Similarly, German anti-Carpet devices were vulnerable to Chaff. The net effect being that Allied ECM was entirely effective in reducing losses despite German ECCM attempts.
According to their (the german's) estimates, it required around 3,000 rounds to down a bomber protected by ECM, and only 800 rounds to down a bomber without such coverage.
From what I have heard they was quite poor guns. For example Tirpitz had alot of these guns and still did not manage to hardly shoot down enemy Aircrafts that was attacking her while also having port based AA as help.
The issue with these guns was amongst other the poor bulky reload system which greatly reduced their fire rate, similar issue as with the type 96 25 mm AA gun.
The best light AA gun used in the war was probably the Oerlikon 20 mm.
The 40 mm bofors also had its own issues but it was a good naval AA gun.
Unfortunately I can't answer about the Tirpitz. I'm not personally knowledgeable on the Tirpitz's AA configuration or fire-control systems. WWII Naval technology in general is outside my knowledge base.
Regarding the land-based stuff though, like German flak guns, the 20-round clip for the 20mm and 8-round clip for the 37mm isn't great, but they were fairly quick to replace. Their upper sustainable fire rate wasn't limited by clip changing but by heat buildup. The firing window for AA guns are short, though, so cyclical rate of fire and maximum attainable rate of fire (which includes time loss to change clips) are more important for AA than their maximum sustainable fire rate. On this parameter the German 20mm is roughly similar to the Oerikon L70.
That's not to say the Oerikon is a bad AA gun, it's not. But you can definitely dispute it. While its sustained fire rate is impressive, other AA guns have that beat in other important metrics. The german light AA had access to mineshells which could pack much more explosives tha a normal HE shell, increasing lethality upon a successful hit, which is very important when it's hard to hit anything. The german 20mm has a significantly higher muzzle velocity (900 m/s vs 820 m/s), which has an effect of reducing the amount of lead needed, and generally make it easier to hit fast-flying aircraft. Basically any larger calibre AA gun (25mm, 30mm, 37mm, 40mm, etc) would have much better ballistic properties and so would have "flatter" profiles be able to more easily hit aircraft at longer distances than a smaller calibre AA gun could.