Try to go the extra mile in being polite. If your words can be interpreted as hostile, on the internet they will be.
Pointing out typos to the author is generally appreciated. There are two helpful things to do: Instead of just complaining in general, list the typos; and try to reach the author directly, e.g. by email.
Pointing out typos to the author is generally appreciated. There are two helpful things to do: Instead of just complaining in general, list the typos; and try to reach the author directly, e.g. by email.