"Comparison is the thief of joy."
Now, with that said, if we're going to compare, let's do it right at least. Why I say that is that comparisons are often good for tracking progress, goal setting, and motivation. However, you need to do it right.
when doing a deadlift routine, I feel quite embarrassed doing my 110 kg max lift, knowing that literally everyone around me can easily repmax 2-3x more.
Firstly, you should never feel bad if someone lifts more than you. You should be thinking "Good for them, they've probably worked hard for it" instead of "Wow, I must be super weak". The latter both puts yourself down and minimizes the work that others have done.
Now, let's say you setup for deadlifts. You're lifting your max for 110 kg. A guy sets up beside you and starts lifting 220 kg. Are you the same height? Weight? Same lifting experience? Same point in a macrocycle? Same strength goals? Was the lift the same RPE? Do you judge RPE the same way? Did you both get the same sleep last night? Are your diets the same? No? So how are you drawing out these comparisons?
"They're lifting 220kg and I'm lifting 110kg. 220 kg / 110 kg means he's 2x stronger." That's simply not true to begin with. If said lifter weighs 110 kg+ you can even check through WILKS or DOTS that they're closer to 40% stronger. You need to compare apples to apples. Also, if you're at a gym where people are routinely lifting 2-3 x 110kg (220-330 kg, 485-727 lb) for reps?? I mean, I want to be at that gym. That sounds like a whole lot of strong people to learn from. And I guarantee that, unless you're ego lifting or an ass-hat, anyone deadlifting 330 kg is just happy to see you there learning and giving it your best. I've personally enjoyed seeing some beginners at my gym start to bulk out and really gain confidence.
So here's my exercise: change the way you talk to yourself. Whenever you find yourself saying "I'm such a weakling" or "They're so strong, I'm so frail" you need to start thinking "I'm not as strong as them yet but I'll get there" or "Last year I could barely lift this, now it's easy. I'm making progress". When making comparisons, start making them properly. Finally, you need to accept that there are people stronger than you and, unless you hit world-class levels, there will always be someone stronger than you, regardless of your size. That's OK.