OH MY GOD this happens all the time with the Tiger I in World of Tanks.

"why doesnt the tiger melt everything in sight and never get blown up i think it should be placed in tier V instead of tier VII"

First off, it's a fucking box without any sloped armor to speak of. You have to be careful with it instead of yelling "KRUPP STAHL" and charging ahead. Even lower-tier tanks like the T-34-85 can reliably penetrate Tigers. That's not dev bias, that's how it was in real life.

At tier VII, the Tiger goes against Tiger-killers such as the IS and T29 (fuck the devs for making the odds fair). Thankfully, the fully-upgraded Tiger is based off an experimental model with the 88mm gun from the Tiger II. If anything, the devs made it more powerful than your average Tiger would have been.

The solution? Quit whining because your mythical tank isn't as powerful as you think it was. The Tiger in WoT is a fine sniping tank and can wreck shit if you use it properly.