I get the inspiration 100%, always glad to meet a fan.
I get where you are coming from about the "not the best I could have done." I know that feeling all too well.
For every 1 track I release there are probably 10 or more so that are in creation limbo that never go anywhere. (They have cool ideas but no structure, the leads are not as full as I would like them to be, etc.).
For me I fall into the thinking of only putting the absolute necessary amount of breaks and intros into a piece, and I only put longer endings now if the song is less than 2 minutes without it (which is something I'm working on and still improving on).
FEEDBACK TO HELP YOU IMPROVE:
To tighten this track I think a good thing to do would be cut the 21 second drum intro and go directly into the drum/synth combo.
You need to grab user attention immediately in drum and bass. Underground Drum and Bass is a lot like punk rock, it's explosive, in your face, and grabs your attention immediately. And that's hard to do with long intros.
If I DO create a long intro, I'll put a drop at the end of the intro before going into an EXPLOSION of a lead and full bass line.
(By drop I basically mean getting rid of all the instruments except for one or dropping them all and adding a new synth or sound) I do this because it tells the listener "Oh damn, something big is about to happen."
And then BAM, you deliver your overpowering main line. (If you check out my track future, that has a long intro but I follow this structure to give it the power for when the main part comes in).
I would also tighten up the part between 1:06 and 1:25. I would make it 4 measures.
Have the first 2 measures be the begging part of the 1:06, then have the last 2 measures be the rim fills and drum hits from 1:25 to 1:26, and then maybe add a double pedal style bass kick, and then a crash cymbal when the main part at 1:28 comes in again.
I also think the drop at 2:11 would be AWESOME if you took out the drums and just had the synth playing for 2 measures. Then ad 2 measures of just a cymbal tap doing a 4/4 hit structure.
Then bring it back to an explosive ending.
POSITIVE FEEDBACK, What I liked:
The lead parts are really great, it 100% got me moving. I would go back and shorten this from being an OK near 3 minute song to a really solid 2:15 track and this would be perfect.
In fact, in my newer songs I tend to be around the 2 minute mark. My philosophy now is focus on simplicity, grabbing the listener right away, and doing more with less.
You obviously understand how to make catchy parts, now you just need to focus on building out your structure to make the lead up to those parts make sense.
Keep going, you have a lot of potential. 👍