U ran bad

that is pretty much all... I see some minor details.

Hand 1 : nh
EDIT : I change it to vnh... this is a must call river only because from villain's perspective you could be holding virtually nothing on river, have displayed extreme weakness and the board is very scary. Unless he is completely incapable of taking a stab at a pot, this call wins money a tremendous amount of the time

Hand 2 : standard

Hand 3 : IMO calling the reriase to 25€ is bad as you'll likely be up against smaller pairs and will miss your flop. Push over the top or fold now rather than later. But u prob right bout some of your outs being dead... A push is not terrible with all the money in the pot though. Calling sux after other dood displays huge strength.

Hand 4 : I love second bullets in general on B 2 B with all the passive-weak floaters but here I dont because villain called a sizeable reraise on extremely dry board. Maybe your read is he's a total donk who calls everything on the flop. If not his likely holdings are a set and 56s which are both never ever gonna fold. Turn either made his hand or didn't do anything to scare him that's for sure. After he calls the reriase I'd like to think I'd slow down on turn (I'd prob fire a donk 2nd bullet myself lol). I think this is the only really bad hand here.

Hand 5 : eww oh well ship it most of the time.

Hand 6 : hard to decide how much to reraise preflop when multi tabling but imo you def did not reraise enough here. there it 5.5€ in pot and you make it 6 to go. Both ppl are now having to call 4 to s ee a 12€ pot getting 3-1. Giving them 2-1 is preferable (point of the 3x their raise typically which doesn't work here because of the call, the minraise factor and the blinds).

+ you want to get HU w 10 10

Hand 6 : folding the river is a losing play over time. HU ppl will often do this with a set/2 pair (lame min raise etc). At VERY LEAST you have to call the river bet. I don't mind how you played it unless you have read that villiain minraise turn means stone-cold nuts.

Hand 7 : vnh EXCEPT river. Not wanting to get bet off best hand happens when u run bad but here we are leading lots of things (A of flush draw or K of flush draw) that will have a tough time calling a river bet but will often bluff when check to. I prefer check-call (and call any bet of course, even a push). Your hand is almost certainly good don't worry bout putting everybody on the nuts all the time cuz you're running bad.

Hand 8 : I like to raise preflop to take control and define villain's hand (and take the chance of winning a small pot).

As is villain needs either a huge draw,a surprising str8, a set of his own or a smallish overpair. Only the last one folds to a push and only the huge draw do we want to milk (cuz his overs are dead obv). I'm torn between jamming after his reraise and making a bigger rereraise on flop. As played I like coming over the top for more like 17€ (look at pot size) on the flop.

Overall : stop running bad wtf is wrong you.