IF bad over the long term?

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>start IF every day about 1.5 months ago
>slowly start to hit new PRs training 5 days on 2 off per week
> peak bench goes from 225 for 5 to 245 for 4
>getting lots of mires
>all the while I feel mentally sharper and hormones are great.
>after 3 weeks lifts plateau
>stop getting morning wood, less boners, feel more beta
>5 weeks in my lifts take a nosedive
> can't even hit 225 for 4 on bench
>feel like shit and tired all the time
What the fuck did I do wrong? Pls help