We drew 12 times last year in the league, several games in which Milner played in, against similar sides that like to minimize space and bark the bus. So how does that equal to a few games, I have no idea. Keita's ability on the ball is vastly superior to Milner, it's one of the many reasons he was brought in. Ability to move in tight spaces,score goals,create chances in tight spaces,etc...
Okay, if we're doing this then
The 12 draws
Watford 3-3 Liverpool (Milner played 5 mins as a sub. High scoring, probably look at our defense?)
Liverpool 1-1 Burnley (Remember Solanke hitting the woodwork late, definitely a game we found hard to break the opposition, I give this one to you - but you have to keep in mind that we had Coutinho as well and even he struggled against that low block)
Newcastle 1-1 Liverpool (Milner didn't play, again struggled even with Coutinho and Coutinho scored a screamer early in the game which was our only goal of the game)
Liverpool 0-0 Man United (No Milner again, didn't break the biggest double-decker bus)
Liverpool 1-1 Chelsea (Milner played this, but Difficult game after after a CL fixture and we only drew due to a fluke goal in the end by Willian)
Liverpool 1-1 Everton (We drew this game despite having a proper attacking mid in Ox and still the main reason we dropped points was the non-penalty given against us as unanimously agreed on RAWK)
Liverpool 0-0 West Brom (Milner didn't play this, Coutinho did and we found it difficult to break down West Brom having been denied a legit goal by Solanke)
Arsenal 3-3 Liverpool (Milner played 77 minutes as Hendo was replaced due to injury, and we scored 3 goals. High scoring draw with defensive mistakes by Mignolet and Gomez)
Liverpool 2-2 Spurs (Milner played and everybody knows who this was on - the ref and his team)
Everton 0-0 Liverpool (At this point, even the Derby seemed 2nd priority to us and we had so many injuries that we played the same midfield over and over again)
West Brom 2-2 Liverpool (Milner played and we had the game in the bag, except for 2 late defensive lapses that gave it away, also playing the game with CL commitments)
Liverpool 0-0 Stoke (Milner came on as a sub and played 25 minutes. See above for CL priorities. 2nd priority game for us due to CL and we played the same midfielders in most games)
'Ability to move in tight spaces,score goals,create chances in tight spaces' - Coutinho & Ox had these aplenty and we still drew games with them. Football's a team game. We drew those games due to combination of factors, not plainly because our squad was unable to break sides, we did it against plenty of sides - with and without Milner. We bought Keita because he's an extremely good player who can become one the bests in his position. Not because our existing midfield (which took us to the CL final btw) players were inept.
With the above games and their breakdown, I'll give you legit 2-3 draws max that we had with Milner being one of the solid reasons (which is the exact definition of 'few games') where we struggled to win. But why let facts get on the way of fallacies eh?