This kind of bird builds its nest in a tree cavity so as to protect its young from predators. For this purpose, a hole going right through the tree trunk isn't suitable.

Although there's nothing wrong with your plan, it just doesn't suit me.

I can't accept Sorewn as my spouse. Her personality doesn't suit me.

True. That color is a bit odd, but I like it, so it's a good fit for me.
(I intend to wear that article of clothing anyway.)

Tsenu is a bad match for Loak.
(Here the speaker is identifying Tsenu as the source of the mismatch. Loak is in the dative.)

Tsenu and Loak are a terrible match for each other.
(Their personalities don't mesh, but neither one is “to blame.” The source of the mismatch is equally divided between Tsenu and Loak.)

Loak isn't good for Tsenu.
(Here the source of the problem is Loak. The speaker is more concerned for Tsenu and is unhappy that she and Loak remain in a relationship.)