Can you always improve?

Yes

 

this is what makes some boxers better than others ,,,

when i spar ,within about 20 seconds I'm looking for a opening ,,by that i mean ive noticed he as thrown a double jab with a straight right ,,if he throws this shot again ,,,i will then be thinking of a counter punch for the 3rd time he throw it ,,,i will slip the second jab & step to the right with my back foot ,hoping he will throw his straight right with is weight on his front foot leaning onto a right upper cut left hook ive throw

this is just a example of reading your opponent ,,,to me i don't feel my boxing ability is improving because i already no how to read my opponent,,,

what i mean by experience is the style of the other boxer ,,does he fight coming forward ,,fights of the back foot ,,if he as knock outs, hes good at looking for opening with power,,,or he may be a busy boxer with no power ,,,the list go's on

most of the time you don't no who you boxing until the bell go's,,so your looking for openings before he does the more experience you have the quicker you will find the opening

lots of coach's teach you how to box ,,its the way to box you need to now as well

 

Is there any boxer that can win every single fight they have without getting hit, with a 100% accuracy rate on their opponents?

No. Therefore there's room for improvement

 

I know how to read my opponents. With experience this ability becomes better, I improve as a boxer...

Nothing in this post backs what you said previously...

 

You can always improve...but things could also go the other direction. Often times we train merely to keep what we've already gained.