V1, can you try with this simsettings:
http://www.mediafire.com/file/28vpjhjdd55pz94/simsettings%282%29.ini/file
It is an older version that didn't suit me because low rated teams were getting too low points at the end of the season in career mode which meant that while winning the league was very challenging, the struggle to avoid relegation was almost inexistent.
I want to add that despite you will be probably able do edit players ratings in Robbie patch with tools like cm16 or DB Master (I can t see why you could not), in the end it might not change the outcome of simulated games by a large extent.
Let me explain myself. The simsettings.ini file that govern simulated results works with scales (8 in default and 10 in my modded one) that determine the minimum and the maximum number of goals a stronger team and a weaker team can score when they play against each other. Each scale correspond to increasing difference in overall rating between the stronger team and the weaker one. So the first scale is for game between teams of almost equivalent rating and the last scale is for game against team with very large difference in overall (all scale in between code for intermediate levels of overall difference ). The overall rating of a team is the outcome of a hidden formula that use the players stats, the team form, the adequacy between players preferred position on the pitch and their actual position on the team sheets and probably others parameters.
The thing is, if the stronger of the two teams is the away team, only the first scale is used to simulate the results of the game. In the end, it is like home teams never face teams with substantially larger overall than their own on their field, but they can play against team with much lower overall.
So in the end, even if San Marion has an overall of 0, they can win home games against lets say England with an overall of 81 (?) because despite their overall difference of 81 points, the odds are taken like if the difference in overall between the two teams was of only of 1 (default ea) or 0.5 (my modded ini).
For example, these are two lists of possible results you can get out of 12 simulated results between a 0 San Marino and a 81 England:
"
2-0" "1-3" "0-1" "2-1" "0-1" "
1-0" "2-3" "
1-0" "
2-0" "0-0" "0-3" "0-1"
"2-3" "1-3" "2-3" "0-3" "1-1" "0-2" "
2-1" "0-2" "1-2" "2-3" "0-0" "
2-0"
So the odds of San Marino winning against England are not that low when they play at home.