You can add leagues, big or small, to Sports Club Stats.
   It's free.
   It's easy.
   Just email import@sportsclubstats.com the:
      structure
      schedule
      and rules
   In a few minutes you'll get back a link to the league.
   Play around, have fun, you won't break anything.
   I look forward to seeing what you create.

Info about the various settings:
   https://docs.google.com/document/d/1-UneDNk6tkOrc_B-WBnGnc5KGiy2kttXC2fW8dR7QzM/edit?hl=en

For example, here is what created this league:

LeagueBegin
  League: DPC CIS Upper Div           (ID: 1a23r) (Sort: Conf) (Playoffs: 3)
    Team: AS Monaco Gambit  (ASM.GMB) (ID: t110ij)
    Team: Team Empire       (Empire)  (ID: t110ih)
    Team: EXTREMUM          (EXTR)    (ID: t110ii)
    Team: Natus Vincere     (Na`Vi)   (ID: t110ik)
    Team: NoTechies         (NT)      (ID: t110im)
    Team: Team Spirit       (TSpirit) (ID: t110in)
    Team: Team Unique       (Unique)  (ID: t110ip)
    Team: Virtus.pro        (VP)      (ID: t110iq)
  Kind: pro
  Sport: dota
  Gender: coed
  Country: CIS
  State: 
  Level: A
  Season: 2021Season1 (current: True)
  Author: Poddo
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
Conf: Seed [(1-8) Call Standard]
Standard: Points, Wins HeadToHead, GoalsDelta HeadToHead, GoalsDelta,
(side) DrawLots, Playoff
Bubble: Points, (side) DrawLots, Playoff
SortEnd

RulesBegin
  PointsForWinInRegulation:  1
  PointsForWinInOvertime:  1
  PointsForWinInShootout:  1
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.5
  WeightType:  PercentOfPointsWon
  WeightExponent:  0
  WhatDoYouCallATie:  tie
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  Major Playoff
  Promote:  1
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  demoted
  Demote:  2
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
1/21/21   EXTR      0-2   TSpirit   (ID: g111myg)
1/22/21   NT        0-2   ASM.GMB   (ID: g111myh)
1/22/21   Unique    0-2   Na`Vi     (ID: g111myi)
1/24/21   NT        0-2   Na`Vi     (ID: g111myj)
1/24/21   VP        2-0   Empire    (ID: g111myk)
1/28/21   EXTR      2-1   Unique    (ID: g111mym)
1/29/21   Empire    2-1   TSpirit   (ID: g111myn)
1/29/21   VP        2-0   ASM.GMB   (ID: g111myp)
1/31/21   Na`Vi     2-1   EXTR      (ID: g111myq)
1/31/21   TSpirit   1-2   NT        (ID: g111myr)
2/4/21    VP        2-0   Unique    (ID: g111mys)
2/5/21    ASM.GMB   2-1   Empire    (ID: g111myt)
2/5/21    VP        2-0   EXTR      (ID: g111myu)
2/7/21    Na`Vi     2-0   Empire    (ID: g111myv)
2/7/21    TSpirit   2-1   ASM.GMB   (ID: g111myw)
2/11/21   Unique    2-0   NT        (ID: g111myx)
2/12/21   Empire    1-2   Unique    (ID: g111myy)
2/12/21   NT        1-2   EXTR      (ID: g111myz)
2/14/21   ASM.GMB   1-2   Na`Vi     (ID: g111mz3)
2/14/21   VP        2-1   TSpirit   (ID: g111mz9)
2/18/21   Empire    0-2   EXTR      (ID: g111mz0)
2/19/21   ASM.GMB   2-0   Unique    (ID: g111mz4)
2/19/21   VP        2-0   NT        (ID: g111mz8)
2/21/21   Empire    2-0   NT        (ID: g111mz1)
2/21/21   Na`Vi     1-2   TSpirit   (ID: g111mz5)
2/25/21   TSpirit         Unique    (ID: g111mz6)
2/26/21   ASM.GMB         EXTR      (ID: g111mz2)
2/26/21   VP              Na`Vi     (ID: g111mz7)
GamesEnd