I think almost all fighting games have too few players to match up people of the same skill level.
Most complaints leveraged against fighting games are the same things talked about with Chess. Too complex, 1v1, can't blame luck/other people, knowledge barrier, etc. But Chess has hundreds of thousands of players. Your only knowledge could be how pieces move and you'll get matched with people who only know how pieces move. You can play and improve at your own pace, or even not improving at all, and still have a good time simply playing the game.
Most fighting games have like 500 people, 1000 on a good day, and they are all masters at the game. You have to get damn good at the game to experience something resembling gameplay and not an extended cutscene of your character getting beaten up. It'd be like if in Chess all players below 2000 spontaneously quit the game and you have to study openings, tactics, middle game strategy, endgame conversions, endgame strategy, to a 2000 Elo level to not get blasted off the board immediately.