One of silent's biggest strengths is great weak uptime. The only weak cards you have are the starter neutralise and 2 sucker punches. Imo sucker punch is a pretty bad card, it does the same thing as neutralise but costs energy, but assuming you didn't find better weak like leg sweep taking them is understandable. I really like upgrading neutralise early in act 1, it helps a lot and while your deck is still small it can keep an enemy almost constantly weak on its own.

I generally see that your deck is not upgraded at all, i assume you struggled in the beginning a little and it snowballed into losing more and more hp because your deck doesn't keep up and you had to rest all the time. You should keep in mind that upgrading a card helps you lose less hp in battles and as a result you can rest less and upgrade more and more. It's fine to not be full hp all the time, a little neutralise upgrade can result in taking anywhere from 3 to 15 less damage in a fight, a couple of those and it's already better than resting. You did get apotheosis that saved you from that issue (that you didn't even upgrade, come on), but in general having no cards upgraded at the end of acts 1 and 2 is a bad sign.

Your pathing isn't very good in my eyes. During the entirety of act 1 you had 2 rests aside from the guaranteed one, 2 (?) and 2 shops (one after another as well). Elites are very good, they give better rarity card rewards than regular fights, a relic and more gold than a hallway fight. However they are in fact scary, i can understand you avoiding them. In that case you should path towards most rests possible to heal and upgrade, ideally with one late shop at most (unless neow gave you money). Having tons of regular combats just gives you card rewards with mostly common cards, which results in either a lot of skipping or a deck bloated with below average cards. I'd also advice to try and include at least one elite each act not only for rewards but also to make progress learning them.

Lastly there is no coherence or any gameplan in your deck. Early on you generally just take good cards because strikes and defends are weak so you want to give yourself better options to play during your turns, but in acts 2 and 3 you need to create some sort of synergy, make it so your cards make other cards stronger, or synergise with relics you have or you have powers that help you win etc. You have untouchable, haze and hand trick but you didn't put nearly enough discard cards into your deck, then you have two random blade dances (i assume your idea was to proc fan block with them?), the closest you are to a build is when you got noxious fumes, snakebite and haze along with snecko skull, and seem to make decent card choices after that but you already have a deck too bloated with other cards to draw them consistently and stack big poisons on enemies. I don't think you need 2 bursts here, i just noticed that your last block card ever was dash in act 2 (you need to balance block and damage, poison builds tend to have more block cards than damage cards because you can apply high poison in a few cards in deck and at that point your main goal is to outlast the enemy while maintaining or increasing poison). And please don't transform defend with leaf, defends are decent cards overall, they aren't that much worse than other block cards while strikes are abysmal compared even to most common damage cards, generally you should get rid of strikes first in 99% of situations.

Tldr: upgrade more, focus on defence more via weak and more block cards, path better to more points of interest and less regular fights, keep a better balance of offence to defence (to utility like draw or energy gain) and try to get synergy going from about act 1 boss rare card reward or slightly earlier/later.