I've been wearing a mask for two years since COVID started, and my ears still hurt from the straps on my masks. That doesn't seem to get any better.
この場合、次のように言うのが良いかなと思います。
ーI've been wearing a mask for two years since COVID started, and my ears still hurt from the straps on my masks. That doesn't seem to get any better.
「コロナが始まって以来2年間マスクを着けているけど、まだマスクのストラップで耳が痛くなるのが変わらない」
to wear a mask で「マスクを着用する」
to get better で「良くなる・改善する・好転する」
ご参考まで!