也可以: Recently, I'm starting to have been feeling that I don't write as well as Ipreviously thought I did in my native language.

注意:在写作时，最好尽量减少使用"我"这个词，以避免显得以自我为中心。说话时，这没有问题。 这是口语和书面英语不同的一种方式。NOTE: When writing, it is best to minimize the use of the word "I" to avoid seeming to self-centered. When speaking, this is no problem. (This is one way that spoken English and written English differ.)

Consciously or not, I do read a lot every day, but when it comes to writing, I don't do it nearly as much也可以: I do lots of reading, but write less often.

原版是可能的，但相当笨重。 上面的修订更加简洁明了。The original is possible, but rather clunky. The revision above is more pithy and succinct.

The feeling gets stronger when也可以: This feeling intensifies as I correct other people's writing on this website.

I probably也可以: Despite knowing what they meantintend to say, but somehow, constrained by the sentence structure they used, it's hard for me to correct itheir writing properly.

And it might be easier to write a diary than to write online, since you're allowed to write something stupid or boring when the only reader is just yourself. XD我的猜测: And perhaps I should keep a personal diary on paper rather than online, since I can write stupid or boring things without worry.

Recently, I'mve been starting to feel that I don't write as well as I thought I did in my native language.

To me, using the simple present tense (“I am”) with “recently” sounds wrong, but others might feel differently.

Theis feeling gets stronger when I correct other people's writing on this website.

"The feeling" is fine, "This feeling" just sounds more natural

I probably know what they meant to say, but somehow,for some reason, when constrained by the sentence structure they used, it's hard for me to correct it properly.

And it might be easier to write a diary than to write online, since you're allowed to write something stupid or boring when the only reader is just yourself. XD

"Just" is redundant, "only" is enough