My thought after many years is that bias is far more rare than people think, and is colored dramatically by their own biases. I attend home games for other teams at our club where I know the parents or kids, and even then my perception is very different than for my own kid's games.
But here is an up to date list of home/away performance that might give you some insight into where home cooking may happen. This is only for clubs that have played at least 15 games this season. Some of them really do raise eyebrows. But others which people complain bitterly have home cooking of the worst type actually do worse at home than away. I know my perception was challenged on one club I thought was worse than others.
Home/Away Points RatioThis is a measure of how well a club's teams play at home vs how they play in away games. A high ratio (greater than 1) means the teams perform better at home than away. A low ratio (less than 1) means the teams perform better away.
12.25: YMCA Arsenal Rome (42 points in 12 home games, 2 points in 7 away games)
3.70: Fayette Futbol Club (40 points in 12 home games, 9 points in 10 away games)
3.03: Georgia Knights Football Club (26 points in 12 home games, 5 points in 7 away games)
2.88: SSA Northside (23 points in 16 home games, 4 points in 8 away games)
2.32: Dacula Select (59 points in 23 home games, 32 points in 29 away games)
1.84: SSA Savannah United (105 points in 35 home games, 67 points in 41 away games)
1.81: KSA Select (59 points in 16 home games, 49 points in 24 away games)
1.74: Liberty Soccer Club (54 points in 19 home games, 18 points in 11 away games)
1.72: Athens United SA (43 points in 15 home games, 35 points in 21 away games)
1.66: UFA Norcross (80 points in 27 home games, 57 points in 32 away games)
1.61: GS Boca Juniors (30 points in 6 home games, 28 points in 9 away games)
1.60: NASA Select (107 points in 33 home games, 73 points in 36 away games)
1.56: Georgia Express FC (12 points in 10 home games, 10 points in 13 away games)
1.55: Alpharetta Ambush Select Soccer (121 points in 41 home games, 40 points in 21 away games)
1.52: Augusta Arsenal Soccer Club (98 points in 28 home games, 53 points in 23 away games)
1.46: All-In Futbol Club - 01 (54 points in 18 home games, 41 points in 20 away games)
1.44: Hinesville Soccer Association (13 points in 9 home games, 16 points in 16 away games)
1.35: Inter Atlanta FC Blues (90 points in 34 home games, 55 points in 28 away games)
1.33: AFC Lightning (61 points in 24 home games, 44 points in 23 away games)
1.28: Richmond Hill Soccer Club (25 points in 8 home games, 22 points in 9 away games)
1.24: Georgia Storm SA (60 points in 18 home games, 43 points in 16 away games)
1.24: S S A (136 points in 47 home games, 166 points in 71 away games)
1.20: Concorde Fire S.C. (178 points in 66 home games, 157 points in 70 away games)
1.19: Effingham County Rec & Parks (46 points in 12 home games, 29 points in 9 away games)
1.17: Oconee Futbol Club (72 points in 20 home games, 37 points in 12 away games)
1.15: Alliance Soccer Club (22 points in 8 home games, 24 points in 10 away games)
1.12: LSA Select (58 points in 19 home games, 19 points in 7 away games)
1.10: Georgia Storm Madison (30 points in 10 home games, 30 points in 11 away games)
1.07: UFA (193 points in 82 home games, 145 points in 66 away games)
1.07: HCSA Thunder Soccer Club (24 points in 15 home games, 9 points in 6 away games)
1.06: GSA Academy/Select (79 points in 31 home games, 120 points in 50 away games)
1.04: Cherokee Impact Select (25 points in 13 home games, 48 points in 26 away games)
1.03: Rapids FC (44 points in 15 home games, 37 points in 13 away games)
1.03: Chiefs FC (71 points in 40 home games, 57 points in 33 away games)
1.00: Decatur-DeKalb YMCA Soccer Club (51 points in 17 home games, 27 points in 9 away games)
1.00: Georgia Rush Select (32 points in 16 home games, 42 points in 21 away games)
1.00: CFC Red Star (69 points in 32 home games, 54 points in 25 away games)
1.00: RYSA Select & Academy (63 points in 24 home games, 58 points in 22 away games)
0.97: YMCA Academy & Select (73 points in 30 home games, 100 points in 40 away games)
0.96: UFA South Georgia (81 points in 31 home games, 57 points in 21 away games)
0.96: Tophat (40 points in 19 home games, 35 points in 16 away games)
0.89: Roswell Santos Soccer Club (59 points in 24 home games, 99 points in 36 away games)
0.89: Georgia Futbol Club (34 points in 16 home games, 43 points in 18 away games)
0.86: Southern Alliance Futbol (98 points in 45 home games, 86 points in 34 away games)
0.86: AFC Lightning (71 points in 30 home games, 69 points in 25 away games)
0.84: Bryson Park (42 points in 10 home games, 35 points in 7 away games)
0.82: SSA South Georgia (42 points in 15 home games, 34 points in 10 away games)
0.80: Atlanta Fire United Select (49 points in 36 home games, 63 points in 37 away games)
0.78: Barrow Youth Soccer (31 points in 12 home games, 40 points in 12 away games)
0.74: Smyrna Soccer Club Select (16 points in 6 home games, 47 points in 13 away games)
0.57: Griffin Y.S.C. (17 points in 11 home games, 38 points in 14 away games)