I have no problem with hitting lol,me problem is with how weak the bolter rifle is. In the lore it is something very powerful,here it does less damage than some random thug with a shotgun. The game is a mess,also made only for authists.
This is not inaccurate gameplay balance wise. Bolters do not deal more damage in the TT they are just more likely to penetrate, them dealing more damage and having high overpenetration seems like a reasonable interpretation of the rules. Bolters do not cause more wounds in TT.
That you can just outright shoot through people and kill multiple models with a single Bullet is pretty powerful.
What you are refering to is the Fluff and in the Fluff a Chaos Marine is one of the Strongest and powerful beings in the universe, that also does not translate into the TT where they are "a bit" stronger compared to a Imperial Guardsmen but can just as easily die by a flashlight (lasgun) as any other model they just have to be a tad more lucky.
Let the Fluff be fluff, the Chaos Marine was a pretty big badass in Owlcats interpretation, the balance is just way off on certain aspects of the game.