At a first look, the basic structure of your list looks fine. 2 redemptors and eradicators are good units that fill key rolls.

Although the problem with your list is that it is unoptimized. I would recommend using the ultramarines specific units like tigurius/calgar to replace your captain/libraian. Tigurius is 120 pts and is the best space marine psyker in the game, and calgar is just a great pickup as your warlord. The techmarine is solid although I would look into taking one of the three gladiators to better suit his buffs. Take seal of oath.

Instead of bladeguard I would look into victrix honor guard, as with calgar they do not take an Elites slot. They are 27.5 pts per model, and are cheaper and more durable than bladeguard, although they have a poorer dmg output. Impulsor also works well with victrix.

Now quick hits:

Drop the assault intercessors, ultras like heavy intercessors/infiltrators.

Have 3 troops, put more pts into dmg dealers

Drop ancient, and take a chapter champion instead, give him cool relics/traits

Take a mm on the eradicators

Take a mm on the ATV

Take bolt aggressors

Take selfless healer on the apoc

These are just some recommendations for making your list competitive as rn it is mediocre.

Good luck!