What makes you think TMM is failing now?
Between all the common game modes (1v1-6v6), 2v2 was the least played prior to tmm.
1v1 was 3rd only behind 6v6 and 4v4, as those both contain maps that are constantly played at all times on FAF.
Reviewing current 2v2 queue stats across the months since tmm was released, 2v2 is now basically as popular as ladder itself. In a few month when there’s a solid enough data points to get a new review of game type popularity, I wouldn’t be surprised to see 2v2 near or just below 1v1 in popularity, meaning a near 150-200% improvement in game quantity.