Yes, I have watched the whole thing. It's ok but I felt that Toei was a bit too cheap on the anime so parts felt really really cheesy and more generic shounen sports stuff, and yes Tetsuya wasn't supposed to be sympathized with at the start but I usually can't help but laugh at his failures. There were some pretty long lulls after the first arc and after the middle. Still, it does have nice character development and the arcs with the drug addict and the final part were the best. I really wouldn't mind a remake with better production values though.
If more of the anime was like the last few episodes, I'd think far differently.