I find it difficult going to this store for some reason.
I don't know why, but I'm not that comfortable going to this shop.
この場合、次のような言い方ができますよ。
ーI find it difficult going to this store for some reason.
「どうもこの店に入りづらい」
to find it difficult going in ... で「…に入りづらい」と言えます。
ーI don't know why, but I'm not that comfortable going to this shop.
「なぜかこの店に入りづらい」
not that comfortable going in ... で「…に入るのがあまり心地よくない」=「入りづらい」とも言えます。
ご参考まで!