使いにくい

Kono sumātofon wa ōkisugite, katate de wa tsukainikui desu.

This smartphone is too big and difficult to use with one hand.

Kono hōchō wa kireaji ga warukute, totemo tsukainikui.

This kitchen knife is dull and very difficult to use.

Atarashii shisutemu no gamen wa dezain ga fukuzatsu de, tsukainikui desu.

The screen of the new system has a complex design, making it hard to use.

Hidarikikiyō no hasami wa, migikiki no hito ni totte wa tsukainikui mono desu.

Left-handed scissors are difficult for right-handed people to use.

Kono jisho wa moji ga chiisasugite, sukoshi tsukainikui to kanjimasu.

I feel this dictionary is a bit hard to use because the letters are too small.

Kono apuri wa kinō ga ooi desu ga, sōsa ga muzukashikute tsukainikui desu.

Although this app has many functions, it is hard to use because the operation is difficult.