In 1v1 at least, vetting Paks is quite doable.
Ok, yeah I guess. I play all other modes, mostly 3v3 & 4v4 and there the pak generally gets one, maybe two hits if it had not been scouted before, the enemy becomes aware and takes his armor someplace else or pull back to wait for incindiary, mortars and infantry to first kill the pak and then move in. Or just circle around it if that's an option. Paks don't run very fast.
You might get more shots off but that's due to the enemies calculated risktaking. The Pak 43 on the other hand is never disregarded and should say its prayers after having fired and revealed itself unless the surrounding forces are very strong and the enemy lacks arty options.
I like the Tiger, but I've shifted away from it in 1v1 because I think I can do better with different vehicles or that waiting for it can be a death sentence.
I'm sure some of the frustration comes out of bringin the Tiger out just because you can and because it's fun to have (cool unit), rather than tactical merit. It's an option, and doesn't have to be used, like all commander options. That's how I think of it. Yesterday I played a game and was busy fighting and ended up winning and afterwards realised I forgot to pick a commander.
Sweden
Relic Entertainment
cblanco ★ 
보드카 중대 
VonManteuffel 
Heartless Jäger 
