くらいの => Approximate~ N3
Emphasis on degree
よく => Often... N5
Repetition, habit
どのくらい => how long N5
よく => good, well N5
Emphasis on degree
かのようだ/かのように/かのような => as if; just like ~ N2
~の至り => extremely ~ N1
The highest (comparative) level
ようやく => only just N3
Achievements
そのくせ => and yet; though; in spite of; despite ~ N3
Surprised
ようやく => finally; at last N3
Achievements
よく(ぞ) => how wonderfully, how admirably N3
Exclamatory
ようやく => finally; at last N3
Achievements
…くらいの…しか…ない => Only… at low level N2
Limit, limit