I think that Shamblers aren't that hard, only if you fight them in distance. What I normally do is I get close to them and with their hit animations I have enough time to kill them. But these beast are indeed really cool in the game, and so as yours.
These guys were the only things to make me jump in a video game. I forget the level but there was a door and when it opened the room was black I took a step in and the lights banged on there is a Shambler right in front of me letting out a huge roar. LOL literally jumped back in my chair.
It was e1m6 "The Door to Chton" It also had a nasty moment when you had to pick up the golden key in the room full of lava while standing on a narrow ledge. When you grab the key, that son of a bitch spawned right behind you... So it is 99% that you end up fallen in lava or zzaped to death if doing this moment for the 1st time
Actually, the Shambler is not hairy at all. The hands are covered in both it's victims blood and it's own blood, as it bites into itself in the Quake lore for it's species mating rituals. Although when you arrive it simply wants you dead.