You can always try to disable SMAA.
Or use this SMAA setting
#define SMAA_THRESHOLD 0.08
#define SMAA_MAX_SEARCH_STEPS 25
#define SMAA_MAX_SEARCH_STEPS_DIAG 12
#define SMAA_CORNER_ROUNDING 0
Text will always be slightly unsharp if you apply SMAA/FXAA over it.
No way around that just yet.