Hi guys,

I have a very costly problem in my mindset that I don't know how to fix.

I know I am a good player and I can beat my current stakes for a good winrate if it wasn't for one flaw, which is that I keep thinking regs are trying to bluff me.
As a result I make loose calls and hero call a lot which is costing me a lot of money.

Ie. Someone 3-bets me or 4-bets me and I will talk myself into calling (even if they are unknowns) with a marginal hand because I just feel they are trying to bluff or outplay me (in a typical Blind vs BTN scenario) and I will call down light because I feel they are always bluffing in this spot and my hand must be good.
I am making extremely bad assumptions but I don't realize until after the session when I am reviewing the hands.

I think it is an EGO problem that I don't want to be outplayed or people to bluff me because I think I am better than them (I am playing lower than usual stakes but now stuck at these stakes as a result from this flaw).
My first thought is "he has to be bluffing here, everyones agro in 3bet pots, I'm going to call down with my second pair".

It doesn't always happen, usually I play solid but occasionally I'll start doing all of the above and cost myself a lot of money.

I am not exactly sure what the deep down reasons are why I am doing this and I have no idea where to start.
I have read the Mental game of poker but I am still a bit confused working it out.

I would love to hear some advice if anyone knows what I am talking about.