Rfm clustering problem

I work at a furniture/decor entreprise. I try to do rfm with kmeans. but the silhouette is low 0.3.., I removed r and just kept fm. but it all concentrate in f=2, or distinct f. when i keep only f》2 , it concentrate in f=3 and other distinct f also. I tried adding other variables : tenure, interpurchase time, coefficient variation of interpurchase time to get better clustering. What should I do?

I took two periods only 2025, then 2025 and 2024.