"My fear of swimming is a hassle."
I think you may be using bop incorrectly. In Klingon, it's not a relative pronoun, but an active verb (even though the definition starts with "be" this one is not actually an adjectival verb). Because of that you have three verbs in this sentence, but the relationship between bop and Suv is not defined and the sentence cannot be deciphered.Try using "because" instead of "about".
But "Qal" is not an infinitive (as we call it) . So "QalvIpghach" doesn't mean, "fear to swim", but "fear of swim", eh? So "QalvIpghachwIj" means," my afraid of swim," but "QaltaHvIpghachwIj" means, "my afraid (fear) of swimming", qar'a'? So don't we need a "taH" in there?
Why is Qal not an infinitive? When you put -ghach on the suffix, the verb looses its active quality and participates in the description of a thing. I don't feel like the -taH is really necessary. I agree that what you fear is being within the situation of ongoing swimming, no matter how long that actual swimming goes on. But I do not share a view that the aspect suffixes are so clear cut and have no flexibility. I think it's fine to use them as an infinitive when used with -ghach (and in a few other situations). I would expect David to treat this more strictly than I do and I hope he sees this and comments for a different perspective.