is the trompowsky attack just bad ?

It is amazing

I don't feel that 3 games is enough to make an informed decision on if you should ditch any opening. The Trompowsky attack is a reasonable choice for you to play now as long as you can understand what the plans are. I looked at one of your losses and it's clear that the opening isn't why you lost that game. Continue to work on tactics and if you want to continue playing that opening, find a good game collection from that opening and go through those games. One player that you will especially want to look at is Julian Hodgson

It's definitely good if you know how to play it and if you are good at improvising.

It is not bad. Carlsen even played it in a World Championship Match.
https://www.chessgames.com/perl/chessgame?gid=1847603

It's a solid opening, stop listening to people. If you like it... play it.

What you can't do is bounce around from one opening to another.

The Tromp is fine.

yes the Trompovski is good. one main advantage is that it takes away all of blacks other Nf6 defense options. for the white player this reduces the amount of theory that you need to know by probably 95%. and puts the black player into a game that he doesn't play regularly. less experience, less comfortable than his regular defense.

the downside: as white, you have to reconcile two potential problems.

a) what is your plan if black does not allow you to take the knight on f6?

b) messy pawn positions are characteristic of this opening from both sides.

this opening was very popular in the 80s and 90s. there are some lines for black that equalize fairly quickly. most have been "forgotten" because the masses always follow what the elite players find fashionable at any given time.

The trompowsky it's not a bad opening at all! it's probably the best option you have if you don't want to enter in the main lines territory. It also creates good winning chances since you basically created an imbalance in the position. (and in the main lines with c5 and Ne5 the game just turns rather in a mess x3c) People tend to say these sidelines-like openings are "bad" just because of a 0.01 centipawn diference.

On the bright side, you “don’t have to face Black’s anti-d4 prep in the Indian Games”. However, literally ANY Nf6 player worth their salt WILL have their own pet line against the Trompowsky, and you just allow Black to equalize on move 2 essentially no matter what option they pick. It really isn’t even all that principled either, as you often end up either retreating the bishop or trading it (read: moving the same piece twice in the opening AND trading bishop for knight without good reason), and you can’t even get a consistent pawn structure or piece placement to play against. It’s like playing d4-c4 except you don’t even get an advantage to play with.

It's a strong but complicated opening

The Trompowsky is rare enough that no one will be well prepared for it sub 2000. Even past that, it can be a solid surprise weapon. I've played this opening a bit myself, and it is a simple, easy to play opening with straightforward play and ideas. Few players know the most challenging lines, and even if they go for it, you can prepare a rare surprise line in response. Most players your rating will unknowingly transpose to a variation of the French, fall victim to a kingside attack in the Ne4, h4, Nxg5, hxg5 lines, or allow you to accomplish your opening objective in a respective line without putting up much of a fight.

Getting your opponent out of book and into your book is a very good thing. You could play this opening with success until 2400 (i.e. probably your entire life) without needing to think about changing to a more mainline opening... by that point you'd able to play anything regardless. In the meantime you'll just be getting your opponents out of book, which can only be good for you...
Though at your rating I don't think you should go with one particular opening, you should try out many different openings. Just so that you get an overview of things.

I played a lot against the Trompovski as black because I was a KID player.